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Search Atlas SEO – OTTO AI SEO Automation for WordPress / 2.7.2
Search Atlas SEO – OTTO AI SEO Automation for WordPress v2.7.2
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← All changes | otto/Otto_html_class.php +2029 -196 2.6.12 → 2.7.2 View file →
@@ -14,8 +14,13 @@
14 14 */
15 15
16 16 Class Metasync_otto_html{
17 17
18 + # Marker announcing that OTTO processed this <head>. Deliberately a comment
19 + # rather than an attribute on the tag — see mark_head_optimized().
20 + const HEAD_OPTIMIZED_TOKEN = 'metasync_optimized';
21 + const HEAD_OPTIMIZED_MARKER = '<!--metasync_optimized-->';
22 +
18 23 # html dom
19 24 private $dom;
20 25
21 26 # the file path to save to
@@ -62,9 +67,9 @@
62 67 return $html;
63 68 }
64 69
65 70 /**
66 - * WP-355: Fix malformed self-closing non-void HTML tags before DOM parsing.
71 + * Fix malformed self-closing non-void HTML tags before DOM parsing.
67 72 *
68 73 * Some themes (e.g. Bootstrap Component Blox) output malformed tags like:
69 74 * <ul/ class="sub-menu dropdown-menu" />
70 75 * SimpleHtmlDom interprets <ul/ as a void element, strips all attributes,
@@ -126,10 +131,197 @@
126 131 return str_ireplace(array_keys($map), array_values($map), $html);
127 132 }
128 133
129 134 /**
130 - * WP-355 / WP-315: Capture ALL <style> blocks before DOM processing.
135 + * Quote unquoted attribute values before DOM parsing.
131 136 *
137 + * Per the HTML spec an unquoted attribute value ends at whitespace, so
138 + * browsers read this correctly:
139 + *
140 + * data-autoplay-viewport=80%
141 + * data-mousewheel="false"
142 + * data-type="carousel"
143 + *
144 + * SimpleHtmlDom does not stop at the whitespace. It runs to the next quote
145 + * character, so the value becomes
146 + * `80%\n data-mousewheel="false"\n data-type="carousel"...` and EVERY
147 + * following attribute on the tag is swallowed into it and lost.
148 + *
149 + * Supreme Modules' image carousel emits exactly that markup. The attributes
150 + * lost after it include data-type, data-slider-orientation and
151 + * data-slideshow-to-show, so Swiper initialises on defaults, stacks all
152 + * slides and grows the page by one slide-set per autoplay tick until it is
153 + * tens of thousands of pixels tall.
154 + *
155 + * Normalising to `data-autoplay-viewport="80%"` before parsing makes the
156 + * markup unambiguous, so no attribute is lost. Already-quoted values are
157 + * left untouched, and <script>/<style> bodies are shielded so their
158 + * contents are never mistaken for tags.
159 + *
160 + * @param string $html Raw HTML before DOM parsing.
161 + * @return string HTML with every unquoted attribute value quoted.
162 + */
163 + private function quote_unquoted_attribute_values($html) {
164 + # Shield <script>/<style> bodies — their contents can contain '<' and '='
165 + # and must never be treated as markup.
166 + $protected = array();
167 + $html = preg_replace_callback(
168 + '/<(script|style)\b([^>]*)>(.*?)<\/\1>/is',
169 + function ($m) use (&$protected) {
170 + $token = '<!--METASYNC_ATTRQ_' . count($protected) . '-->';
171 + $protected[$token] = $m[0];
172 + return $token;
173 + },
174 + $html
175 + );
176 +
177 + # Walk real tags only. The alternation lets a quoted value contain '>'
178 + # so the tag boundary is found correctly. Possessive quantifiers (*+ / ++)
179 + # are deliberate: the three branches are mutually exclusive on their first
180 + # character, so backtracking can never produce a different match, and
181 + # forbidding it removes the catastrophic-backtracking risk this shape
182 + # otherwise carries on markup with many quotes and no '>'.
183 + $result = preg_replace_callback(
184 + '/<([a-zA-Z][a-zA-Z0-9:-]*+)((?:[^>"\']++|"[^"]*+"|\'[^\']*+\')*+)>/s',
185 + function ($m) {
186 + if (strpos($m[2], '=') === false) {
187 + return $m[0];
188 + }
189 +
190 + $attrs = $this->quote_unquoted_values_in_attr_region($m[2]);
191 +
192 + # null means nothing needed changing — return the ORIGINAL tag so
193 + # a document of well-formed HTML comes back byte-identical rather
194 + # than merely equivalent.
195 + return $attrs === null ? $m[0] : '<' . $m[1] . $attrs . '>';
196 + },
197 + $html
198 + );
199 +
200 + if ($result === null) {
201 + $result = $html;
202 + }
203 +
204 + if (!empty($protected)) {
205 + $result = str_replace(array_keys($protected), array_values($protected), $result);
206 + }
207 +
208 + return $result;
209 + }
210 +
211 + /**
212 + * Quote the unquoted values inside one tag's attribute region.
213 + *
214 + * Must be a tokeniser, not a regex. A flat pattern over the region cannot
215 + * tell an attribute from ordinary text inside an already-quoted value, and
216 + * would wreck common markup — `content="width=device-width,
217 + * initial-scale=1"` looks like it contains an `initial-scale=1` attribute.
218 + * Quoted values are therefore copied through verbatim and never inspected.
219 + *
220 + * @param string $attrs Attribute region: everything between the tag name and '>'.
221 + * @return string|null Rewritten region, or null when nothing needed changing.
222 + */
223 + private function quote_unquoted_values_in_attr_region($attrs) {
224 + $len = strlen($attrs);
225 + $out = '';
226 + $i = 0;
227 + $changed = false;
228 +
229 + while ($i < $len) {
230 + $c = $attrs[$i];
231 +
232 + # Whitespace between attributes — preserve exactly.
233 + if ($c === ' ' || $c === "\t" || $c === "\n" || $c === "\r" || $c === "\f" || $c === "\v") {
234 + $out .= $c;
235 + $i++;
236 + continue;
237 + }
238 +
239 + # Attribute name.
240 + if (preg_match('/\G[a-zA-Z_:][a-zA-Z0-9_:.\-]*+/', $attrs, $nm, 0, $i)) {
241 + $out .= $nm[0];
242 + $i += strlen($nm[0]);
243 +
244 + # Look past optional whitespace for '='. No '=' means a valueless
245 + # boolean attribute; leave it alone.
246 + $j = $i;
247 + while ($j < $len && strpos(" \t\n\r\f\v", $attrs[$j]) !== false) {
248 + $j++;
249 + }
250 + if ($j >= $len || $attrs[$j] !== '=') {
251 + continue;
252 + }
253 +
254 + $out .= substr($attrs, $i, $j - $i) . '=';
255 + $i = $j + 1;
256 +
257 + # Whitespace after '='.
258 + while ($i < $len && strpos(" \t\n\r\f\v", $attrs[$i]) !== false) {
259 + $out .= $attrs[$i];
260 + $i++;
261 + }
262 +
263 + if ($i >= $len) {
264 + continue;
265 + }
266 +
267 + # Quoted value — copy verbatim through the closing quote so its
268 + # contents are never treated as attributes.
269 + if ($attrs[$i] === '"' || $attrs[$i] === "'") {
270 + $quote = $attrs[$i];
271 + $end = strpos($attrs, $quote, $i + 1);
272 + if ($end === false) {
273 + $out .= substr($attrs, $i);
274 + $i = $len;
275 + } else {
276 + $out .= substr($attrs, $i, $end - $i + 1);
277 + $i = $end + 1;
278 + }
279 + continue;
280 + }
281 +
282 + # Unquoted value — runs to the next whitespace. ('>' cannot occur:
283 + # it would have ended the tag before this region.)
284 + $start = $i;
285 + while ($i < $len && strpos(" \t\n\r\f\v", $attrs[$i]) === false) {
286 + $i++;
287 + }
288 + $value = substr($attrs, $start, $i - $start);
289 +
290 + if ($value === '') {
291 + continue;
292 + }
293 +
294 + # Only rewrite when it actually prevents a loss. SimpleHtmlDom
295 + # mis-parses an unquoted value by running from it to the NEXT
296 + # QUOTE CHARACTER, swallowing everything between. With no quote
297 + # left in this region there is nothing to swallow and the value
298 + # already parses correctly — so leave that markup byte-identical
299 + # rather than churn it. (OceanWP's `style=color:#;` as the final
300 + # attribute is the common benign case.)
301 + $rest = substr($attrs, $i);
302 + if (strpos($rest, '"') === false && strpos($rest, "'") === false) {
303 + $out .= $value;
304 + continue;
305 + }
306 +
307 + $out .= '"' . str_replace('"', '&quot;', $value) . '"';
308 + $changed = true;
309 + continue;
310 + }
311 +
312 + # Anything else (stray punctuation, a '/' before '>', malformed input)
313 + # — copy through untouched.
314 + $out .= $c;
315 + $i++;
316 + }
317 +
318 + return $changed ? $out : null;
319 + }
320 +
321 + /**
322 + * / Capture ALL <style> blocks before DOM processing.
323 + *
132 324 * SimpleHtmlDom can lose or corrupt <style> blocks during parse/serialize,
133 325 * especially those without an id attribute (common in custom themes).
134 326 * This captures every <style> block so we can re-inject any that are lost.
135 327 *
@@ -151,9 +343,9 @@
151 343 return $blocks;
152 344 }
153 345
154 346 /**
155 - * WP-355 / WP-315: Re-inject any <style> blocks lost during DOM processing.
347 + * / Re-inject any <style> blocks lost during DOM processing.
156 348 *
157 349 * Compares the captured blocks against the final HTML and re-injects any
158 350 * that disappeared. Named blocks (with id) are checked by id; anonymous
159 351 * blocks are checked by exact content match.
@@ -184,8 +376,371 @@
184 376
185 377 return $html;
186 378 }
187 379
380 + /**
381 + * Build the new inner HTML for a heading whose text OTTO is replacing,
382 + * preserving the author's inline formatting.
383 + *
384 + * Headings are matched by their stripped text, so the recommended value is
385 + * plain text with no way to know how it maps onto the original markup.
386 + * Writing it back directly would discard whatever was inside — a coloured
387 + * <span>, <em>, <br> line breaks — and visibly restyle the page.
388 + *
389 + * Two cases are safe:
390 + * - the heading is already plain text -> replace it
391 + * - the heading is ONE nested inline wrapper -> keep the wrappers,
392 + * chain around a single run of text swap only the text
393 + *
394 + * Anything else is ambiguous: sibling elements, <br>-separated lines, or
395 + * text mixed with elements have no single place the new sentence belongs.
396 + * Those return null so the caller leaves the heading alone — an unapplied
397 + * suggestion is better than silently restyling the customer's content.
398 + *
399 + * @param string $inner_html Current inner HTML of the heading.
400 + * @param string $replacement_text New text, already escaped by the caller.
401 + * @return string|null New inner HTML, or null to skip this heading.
402 + */
403 + public static function build_heading_inner_html($inner_html, $replacement_text) {
404 + $inner = trim($inner_html);
405 +
406 + # Plain text — nothing to preserve.
407 + if (strpos($inner, '<') === false) {
408 + return $replacement_text;
409 + }
410 +
411 + # Inline elements whose wrapper carries the styling worth keeping.
412 + # Deliberately excludes <br>: it encodes line structure, not styling,
413 + # and its presence means the heading has more than one text run.
414 + $inline = 'span|em|strong|b|i|u|a|small|mark|abbr|cite|q|s|sub|sup|font';
415 +
416 + $open = '';
417 + $close = '';
418 +
419 + # Peel wrappers outermost-in. The greedy (.*) means a heading with
420 + # sibling elements (e.g. <em>A</em><br><em>B</em>) leaves stray tags in
421 + # $inner, which the ambiguity check below then rejects.
422 + while (preg_match('#^<(' . $inline . ')(\s[^>]*)?>(.*)</\1\s*>$#is', $inner, $m)) {
423 + # Group 2 (the attribute list) is optional but always captured as ''
424 + # when absent, because group 3 follows it.
425 + $open .= '<' . $m[1] . $m[2] . '>';
426 + $close = '</' . $m[1] . '>' . $close;
427 + $inner = trim($m[3]);
428 +
429 + if (strpos($inner, '<') === false) {
430 + return $open . $replacement_text . $close;
431 + }
432 + }
433 +
434 + # Still markup left after peeling — ambiguous, so don't touch it.
435 + return null;
436 + }
437 +
438 + /**
439 + * / Protect entity-encoded `srcdoc` attribute values before DOM parsing.
440 + *
441 + * Lazy-loaded YouTube/video facades embed a full HTML document inside an
442 + * iframe's `srcdoc` attribute, entity-encoded:
443 + * <iframe srcdoc="&lt;style&gt;*{overflow:hidden}...&lt;/style&gt;&lt;a&gt;..."></iframe>
444 + * SimpleHtmlDom decodes that value and re-emits the inner <style>/<a>/<img>
445 + * as REAL nodes hoisted into the document <head>. The facade's global CSS
446 + * (`*{overflow:hidden}`, `img,span{position:absolute;width:100%;...}`) then
447 + * nukes the entire page layout — the page renders blank below the header even
448 + * though all body content is still present (so the element-loss guard can't
449 + * see it). We swap each srcdoc value for an opaque token before parsing and
450 + * restore it verbatim afterward, so SimpleHtmlDom never touches it.
451 + *
452 + * @param string $html Raw HTML before DOM parsing.
453 + * @param array $store (out) token => original encoded value.
454 + * @return string HTML with srcdoc values tokenized.
455 + */
456 + private function protect_srcdoc_attributes($html, &$store) {
457 + $store = array();
458 + $index = 0;
459 + return preg_replace_callback(
460 + '/\bsrcdoc\s*=\s*(["\'])(.*?)\1/is',
461 + function ($m) use (&$store, &$index) {
462 + $token = '__METASYNC_SRCDOC_' . ($index++) . '__';
463 + $store[$token] = $m[2];
464 + return 'srcdoc="' . $token . '"';
465 + },
466 + $html
467 + );
468 + }
469 +
470 + /**
471 + * Restore srcdoc values tokenized by protect_srcdoc_attributes().
472 + * Tokens are unique and never altered by SimpleHtmlDom, so a plain
473 + * str_replace on the final output is safe.
474 + *
475 + * @param string $html Processed HTML.
476 + * @param array $store Token map from protect_srcdoc_attributes().
477 + * @return string
478 + */
479 + private function restore_srcdoc_attributes($html, $store) {
480 + if (empty($store)) {
481 + return $html;
482 + }
483 + return str_replace(array_keys($store), array_values($store), $html);
484 + }
485 +
486 + /**
487 + * Safety net — strip any lazy-video FACADE <style> that leaked into the
488 + * document as a real stylesheet.
489 + *
490 + * Lazy YouTube/video facades carry this exact CSS reset inside their iframe
491 + * srcdoc: *{...overflow:hidden} html,body{height:100%} img,span{position:absolute;width:100%;...}
492 + * If anything (SimpleHtmlDom attribute-decode, capture/restore_lost_style_blocks)
493 + * hoists it out of the srcdoc into a real <style>, it absolutely-positions every
494 + * image and span on the page and clips all overflow — rendering the page blank
495 + * below the header. No legitimate global stylesheet ever does this to img,span,
496 + * so removing such a block is safe.
497 + *
498 + * Must run AFTER srcdoc values are tokenized (protect_srcdoc_attributes) so the
499 + * encoded copy still living inside the iframe attribute is never matched.
500 + *
501 + * @param string $html
502 + * @return string
503 + */
504 + /**
505 + * Crash-free guard for full-document string transforms.
506 + *
507 + * PCRE operations (preg_replace / preg_replace_callback) return NULL when they
508 + * hit a limit — most notably "JIT stack limit exhausted" on Divi/page-builder
509 + * pages whose large inline <style> blocks defeat tempered-greedy patterns.
510 + * Historically that NULL propagated through the rest of the pipeline, so
511 + * process_html_directly() returned empty HTML, the render strategy's 50%-size
512 + * sanity check rejected it, and the ORIGINAL un-optimised page was served —
513 + * OTTO silently did nothing.
514 + *
515 + * This guard keeps the last-good HTML whenever a transform yields NULL (or an
516 + * unexpectedly empty string), so a single failing regex can no longer discard
517 + * every OTTO optimisation. It is defence-in-depth: the specific pattern that
518 + * triggered (strip_hoisted_facade_styles) has been rewritten to be
519 + * non-backtracking, but this guard still protects the rest of the pipeline.
520 + *
521 + * @param string|null $new Result of the transform.
522 + * @param string $prev HTML before the transform (fallback value).
523 + * @param string $where Transform name, for the log line.
524 + * @return string
525 + */
526 + private function otto_guard_html($new, $prev, $where = '') {
527 + if ($new === null || (is_string($new) && $new === '' && $prev !== '')) {
528 + # A full-document transform ($where) returned NULL (e.g. a PCRE
529 + # limit such as "JIT stack limit exhausted"). Keep the last-good
530 + # HTML so one failed step can't discard every OTTO optimisation.
531 + # Intentionally silent — not logged, to keep customer logs clean.
532 + return $prev;
533 + }
534 + return $new;
535 + }
536 +
537 + private function strip_hoisted_facade_styles($html) {
538 + # Non-backtracking implementation.
539 + #
540 + # The previous single-regex approach used two tempered-greedy segments
541 + # ((?:(?!</style>).)*?) to keep the match inside one <style> block. That
542 + # runs a negative lookahead for every character, and on Divi/page-builder
543 + # pages whose inline <style> blocks are tens of KB it overflows the PCRE
544 + # JIT stack ("JIT stack limit exhausted"). preg_replace() then returns
545 + # NULL, which discarded the entire OTTO-modified document.
546 + #
547 + # Instead, isolate each <style>…</style> block with a single lazy .*?
548 + # (cheap, no per-char lookahead) and test only that bounded block for the
549 + # facade signature. The signature check runs on one small block at a time,
550 + # so neither pattern can strain the JIT stack.
551 + if (!is_string($html) || stripos($html, '<style') === false) {
552 + return $html;
553 + }
554 +
555 + $out = preg_replace_callback(
556 + '#<style\b[^>]*>.*?</style>#is',
557 + static function ($m) {
558 + # Facade reset: "img,span{ … position:absolute … }" inside this block.
559 + if (preg_match('#\bimg\s*,\s*span\s*\{[^}]*position\s*:\s*absolute[^}]*\}#is', $m[0])) {
560 + return '';
561 + }
562 + return $m[0];
563 + },
564 + $html
565 + );
566 +
567 + # Belt-and-suspenders: if PCRE still fails for any reason, keep the input.
568 + return $out === null ? $html : $out;
569 + }
570 +
571 + /**
572 + * Mark the <head> as OTTO-processed without altering the <head> tag itself.
573 + *
574 + * This marker used to be an attribute — <head metasync_optimized> — which
575 + * removed the literal string "<head>" from the document. Anything that
576 + * injects into the head with a literal str_replace('<head>', ...) then found
577 + * no match on the real tag and silently matched the *next* literal "<head>"
578 + * further down the page. That next one can sit inside a JS comment, a <pre>
579 + * block or escaped documentation text; injecting a <script>...</script> there
580 + * closes the enclosing script early, strands the rest of its code as a text
581 + * node in <head>, and the browser therefore ends <head> at that point —
582 + * pushing title, canonical, OG/Twitter and JSON-LD into <body>, where
583 + * crawlers and social scrapers ignore them.
584 + *
585 + * A comment placed immediately after the tag carries the same signal and
586 + * leaves the tag byte-identical. Note that an HTML minifier may strip
587 + * comments, so treat the <meta name="otto"> tag as the durable marker; this
588 + * one is a convenience for support and QA.
589 + *
590 + * Only the first <head> is marked. The real tag is always the first one in
591 + * the document, so this pass cannot wander the way a bare literal match can.
592 + *
593 + * @param string $html Serialized HTML.
594 + * @return string
595 + */
596 + private function mark_head_optimized($html)
597 + {
598 + # Idempotent, and also a no-op on pages still carrying the legacy
599 + # attribute form (e.g. HTML already in a page cache).
600 + if ($html === '' || strpos($html, self::HEAD_OPTIMIZED_TOKEN) !== false) {
601 + return $html;
602 + }
603 +
604 + $out = preg_replace(
605 + '/(<head(?:\s[^>]*)?>)/i',
606 + '$1' . self::HEAD_OPTIMIZED_MARKER,
607 + $html,
608 + 1
609 + );
610 +
611 + # Belt-and-suspenders: if PCRE fails for any reason, keep the input.
612 + return $out === null ? $html : $out;
613 + }
614 +
615 + /**
616 + * Apply OTTO's canonical via string replacement (reliable fallback).
617 + *
618 + * Why the DOM path fails: do_header_replacements() sets the canonical with a
619 + * DOM attribute edit ($link->href = …). That edit works in isolation, but
620 + * insert_header_html() runs *earlier* in the same pipeline and reassigns
621 + * $head->outertext to a raw string (to inject OTTO's schema). In SimpleHtmlDom,
622 + * assigning ->outertext freezes that node — <head> now serializes as that
623 + * literal string and no longer re-renders from its child node tree. The
624 + * canonical <link> is captured inside that frozen string with its OLD href, so
625 + * the later $link->href edit is never reflected in the output and the SEO
626 + * plugin's (Yoast/Rank Math/AIOSEO) canonical always wins. This is the same
627 + * head-freeze that forced title/meta onto string-replacement fallbacks;
628 + * canonical was the one case that never got one.
629 + *
630 + * This pass runs on the final serialized HTML (after the freeze), so it is
631 + * immune to the ordering problem. It guarantees exactly one canonical —
632 + * OTTO's: it removes every existing <link rel="canonical"> and inserts OTTO's
633 + * recommended value (marked data-otto="true") right after <head>. Manual
634 + * canonicals (_metasync_canonical_url / meta_canonical) still take priority,
635 + * matching the DOM path's protection.
636 + *
637 + * @param string $html Serialized HTML.
638 + * @param array $replacement_data OTTO suggestions.
639 + * @return string
640 + */
641 + private function apply_canonical_via_string($html, $replacement_data) {
642 + if (!is_string($html) || empty($replacement_data['header_replacements']) || !is_array($replacement_data['header_replacements'])) {
643 + return $html;
644 + }
645 +
646 + # Find OTTO's canonical recommendation.
647 + $canonical = '';
648 + foreach ($replacement_data['header_replacements'] as $item) {
649 + if (($item['type'] ?? '') === 'link' && ($item['rel'] ?? '') === 'canonical') {
650 + $canonical = $item['recommended_value'] ?? $item['value'] ?? '';
651 + break;
652 + }
653 + }
654 + if (empty($canonical) || !is_string($canonical)) {
655 + return $html;
656 + }
657 +
658 + # Validate OTTO's own suggestion too: if the platform payload
659 + # carries a corrupted/non-URL canonical, leave the document untouched.
660 + $canonical = Metasync_Canonical_Sanitizer::sanitize($canonical);
661 + if ($canonical === '') {
662 + return $html;
663 + }
664 +
665 + # Respect a manually-set canonical (same protection as the DOM path).
666 + # Validated: a legacy row corrupted to "Array" must not count
667 + # as a manual canonical — that would suppress OTTO's correct value.
668 + if (function_exists('is_singular') && is_singular()) {
669 + $post_id = function_exists('get_the_ID') ? get_the_ID() : 0;
670 + if ($post_id) {
671 + $custom = Metasync_Canonical_Sanitizer::sanitize(get_post_meta($post_id, '_metasync_canonical_url', true));
672 + if ($custom === '') {
673 + $custom = Metasync_Canonical_Sanitizer::sanitize(get_post_meta($post_id, 'meta_canonical', true));
674 + }
675 + if ($custom !== '') {
676 + return $html; # manual canonical wins — leave the document untouched
677 + }
678 + }
679 + }
680 +
681 + # Only proceed if there is a <head> to place the tag in (never end up with zero canonical).
682 + if (!preg_match('#<head\b[^>]*>#i', $html)) {
683 + return $html;
684 + }
685 +
686 + $tag = '<link rel="canonical" href="' . htmlspecialchars($canonical, ENT_QUOTES, 'UTF-8') . '" data-otto="true" />';
687 +
688 + # Remove every existing canonical link (bounded per-tag pattern; null-safe).
689 + $stripped = preg_replace('#<link\b[^>]*\brel=(["\'])canonical\1[^>]*>\s*#i', '', $html);
690 + if (is_string($stripped)) {
691 + $html = $stripped;
692 + }
693 +
694 + # Insert OTTO's canonical right after <head> (callback avoids $/\ interpolation from the URL).
695 + $inserted = preg_replace_callback('#(<head\b[^>]*>)#i', function ($m) use ($tag) {
696 + return $m[1] . "\n" . $tag;
697 + }, $html, 1);
698 + if (is_string($inserted)) {
699 + $html = $inserted;
700 + }
701 +
702 + return $html;
703 + }
704 +
705 + /**
706 + * Keep the charset declaration within the first 1024 bytes of <head>.
707 + *
708 + * OTTO injects meta tags + JSON-LD schema at the top of <head>, which can push
709 + * the theme's <meta charset="utf-8"> past the 1024-byte limit that browsers
710 + * enforce for in-document charset detection (HTML spec). When that happens —
711 + * and a cached/CDN response is served without an HTTP charset header — the
712 + * document falls back to the locale encoding (Windows-1252). External
713 + * stylesheets that declare no @charset of their own (e.g. a theme rule like
714 + * `content:"\2713"` written as a raw UTF-8 ✓) then inherit that wrong encoding
715 + * and render as mojibake ("âœ"" instead of "✓").
716 + *
717 + * We guarantee a <meta charset="UTF-8"> as the first child of <head> whenever
718 + * one isn't already present within the first 1024 bytes. Harmless when a valid
719 + * early charset already exists (we skip), and a duplicate later declaration is
720 + * ignored by the browser (first one wins).
721 + *
722 + * @param string $html
723 + * @return string
724 + */
725 + private function ensure_early_charset_meta($html) {
726 + if (!preg_match('/<head\b[^>]*>/i', $html, $m, PREG_OFFSET_CAPTURE)) {
727 + return $html;
728 + }
729 + $inner_start = $m[0][1] + strlen($m[0][0]);
730 +
731 + # Already declared early enough? Leave it alone (also covers AMP, which
732 + # requires charset as the first child).
733 + $window = substr($html, $inner_start, 1024);
734 + if (preg_match('/<meta[^>]*charset/i', $window)) {
735 + return $html;
736 + }
737 +
738 + return substr($html, 0, $inner_start)
739 + . '<meta charset="UTF-8">'
740 + . substr($html, $inner_start);
741 + }
742 +
188 743 #
189 744 function __construct($otto_uuid){
190 745
191 746 # set the site uuid using the provided string
@@ -230,9 +785,9 @@
230 785 $response = wp_remote_get($url_with_params, $args);
231 786
232 787 # Check for errors
233 788 if (is_wp_error($response)) {
234 - error_log('MetaSync ' . Metasync::get_whitelabel_otto_name() . ': API call failed - ' . $response->get_error_message());
789 + error_log('MetaSync ' . Metasync::get_whitelabel_otto_name() . ': API call failed - ' . $response->get_error_message()); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log -- unreachable in production
235 790 return false;
236 791 }
237 792
238 793 # get the response body
@@ -242,9 +797,9 @@
242 797 $response_code = wp_remote_retrieve_response_code($response);
243 798
244 799 # if no change data skip
245 800 if (empty($body) || $response_code !== 200){
246 - error_log('MetaSync ' . Metasync::get_whitelabel_otto_name() . ': API returned empty or non-200. Code: ' . $response_code);
801 + error_log('MetaSync ' . Metasync::get_whitelabel_otto_name() . ': API returned empty or non-200. Code: ' . $response_code); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log -- unreachable in production
247 802 return false;
248 803 }
249 804
250 805 # set the html file path
@@ -437,9 +992,11 @@
437 992
438 993 # Check for timeout or connection errors
439 994 if (is_wp_error($route_html)) {
440 995 $error_msg = $route_html->get_error_message();
441 - error_log('MetaSync ' . Metasync::get_whitelabel_otto_name() . ' DEBUG: FAILED - wp_remote_get error: ' . $error_msg . ' for route: ' . $route);
996 + if (function_exists('metasync_otto_report_render_failure')) {
997 + metasync_otto_report_render_failure('HTTP_FETCH_FAILED', 'Internal fetch failed: ' . $error_msg, [], 'warning');
998 + }
442 999 return false;
443 1000 }
444 1001
445 1002 # get body
@@ -447,31 +1004,87 @@
447 1004
448 1005 # Get the response code
449 1006 $response_code = wp_remote_retrieve_response_code($route_html);
450 1007
1008 + // Requests follows redirects and returns the final body with its final
1009 + // status. Do not put that body on the original route when a redirect
1010 + // changed the URL: doing so creates a soft redirect with mismatched
1011 + // content and SEO metadata. The normal WordPress request can handle
1012 + // the redirect, and OTTO will process the destination on its own URL.
1013 + $effective_url = $this->get_effective_fetch_url($route_html);
1014 + if ($effective_url !== '' && !$this->fetch_url_matches_route($effective_url, $route, $request_body)) {
1015 + return false;
1016 + }
451 1017
1018 + # Capture the internal fetch's `Set-Cookie`. On the HTTP path OTTO keeps only the
1019 + # body below and would otherwise discard this — but it is both the form/session
1020 + # signal for the caching decision AND (same-origin only) the session the visitor
1021 + # needs for their forms to work. $request_body is the URL actually fetched (it may
1022 + # be rewritten to localhost for tunnels), so only allow pass-through when its
1023 + # scheme+host match the visitor's; otherwise we would set a wrong-domain cookie.
1024 + if (class_exists('Metasync_Otto_Render_Strategy')) {
1025 + $fetch_set_cookie = wp_remote_retrieve_header($route_html, 'set-cookie');
1026 + $fetch_parts = wp_parse_url($request_body);
1027 + $visitor_host = preg_replace('/:\d+$/', '', $_SERVER['HTTP_HOST'] ?? '');
1028 + $same_origin = !empty($fetch_parts['host'])
1029 + && strcasecmp($fetch_parts['host'], $visitor_host) === 0
1030 + && ((($fetch_parts['scheme'] ?? '') === 'https') === (bool) is_ssl());
1031 + Metasync_Otto_Render_Strategy::set_http_fetch_cookie($fetch_set_cookie, $same_origin);
1032 +
1033 + # Also record the internal response's own `Cache-Control`. When the page's
1034 + # render starts a PHP session, PHP emits its session cache-limiter headers
1035 + # (`no-store, no-cache, must-revalidate`) — and it does so whether the session
1036 + # is new OR resumed, so this catches session pages that set no NEW cookie and
1037 + # would otherwise look cacheable. It is read as a signal only and never
1038 + # forwarded to the visitor: our own no-cache request header is not echoed into
1039 + # the response, so this cannot make ordinary pages uncacheable.
1040 + Metasync_Otto_Render_Strategy::set_http_fetch_cache_control(
1041 + wp_remote_retrieve_header($route_html, 'cache-control')
1042 + );
1043 + }
1044 +
1045 +
452 1046 # check not empty
453 1047 if(empty($html_body) || $response_code !== 200){
454 - error_log('MetaSync ' . Metasync::get_whitelabel_otto_name() . ' DEBUG: FAILED - Empty body or non-200 status for route: ' . $route);
1048 + if (function_exists('metasync_otto_report_render_failure')) {
1049 + metasync_otto_report_render_failure('HTTP_FETCH_EMPTY', 'Internal fetch returned empty body or non-200 status (HTTP ' . intval($response_code) . ')', [], 'warning');
1050 + }
455 1051 return false;
456 1052 }
457 1053
1054 + # Skip DOM processing on oversized documents to avoid fatal OOM.
1055 + if (class_exists('Metasync_Otto_Render_Strategy')
1056 + && !Metasync_Otto_Render_Strategy::is_document_processable(strlen($html_body))
1057 + ) {
1058 + Metasync_Otto_Render_Strategy::log_oversized_skip('handle_route_html', strlen($html_body));
1059 + return false;
1060 + }
1061 +
458 1062 # Remove XML declaration
459 1063 $html_body = preg_replace('/<\?xml[^?]*\?>\s*/i', '', $html_body);
460 1064
461 - # WP-355 / WP-315: Save ALL original <style> blocks before DOM processing.
1065 + # / Save ALL original <style> blocks before DOM processing.
462 1066 # SimpleHtmlDom can lose or corrupt style blocks during parse/serialize —
463 1067 # not only Divi's id-tagged ones but also anonymous <style> blocks used by
464 1068 # custom themes for nav collapse CSS, responsive breakpoints, etc.
465 1069 $original_style_blocks = $this->capture_style_blocks($html_body);
466 1070
1071 + # Shield entity-encoded srcdoc values (lazy YouTube/video facades)
1072 + # so SimpleHtmlDom can't decode them and hoist their global <style> into <head>.
1073 + $srcdoc_store = array();
1074 + $html_body = $this->protect_srcdoc_attributes($html_body, $srcdoc_store);
1075 +
467 1076 # Escape bare < in text content (e.g. "<4 microns") before DOM parsing
468 1077 $html_body = $this->sanitize_text_less_than($html_body);
469 1078
470 - # WP-355: Fix malformed self-closing non-void tags (e.g. <ul/ class="...">)
1079 + # Fix malformed self-closing non-void tags (e.g. <ul/ class="...">)
471 1080 # before DOM parsing — SimpleHtmlDom strips attributes from these.
472 1081 $html_body = $this->fix_malformed_self_closing_tags($html_body);
473 1082
1083 + # Quote unquoted attribute values (e.g. data-autoplay-viewport=80%) —
1084 + # SimpleHtmlDom swallows every following attribute into such a value.
1085 + $html_body = $this->quote_unquoted_attribute_values($html_body);
1086 +
474 1087 # now that the html is not empty
475 1088 # load it into the simple html dom
476 1089 $this->dom->load($html_body, true, false);
477 1090
@@ -599,13 +1212,19 @@
599 1212
600 1213 $result_html = preg_replace_callback(
601 1214 '/(<' . $heading_type . '(?:\s[^>]*)?>)(.*?)(<\/' . $heading_type . '>)/is',
602 1215 function ($m) use ($current_value, $recommended_value) {
603 - $inner_text = trim(preg_replace('/\s+/', ' ', html_entity_decode(strip_tags($m[2]), ENT_QUOTES, 'UTF-8')));
604 - if ($inner_text === $current_value) {
605 - return $m[1] . $recommended_value . $m[3];
1216 + $inner_text = trim(preg_replace('/\s+/', ' ', html_entity_decode(wp_strip_all_tags($m[2]), ENT_QUOTES, 'UTF-8')));
1217 + if ($inner_text !== $current_value) {
1218 + return $m[0];
606 1219 }
607 - return $m[0];
1220 + # Keep the author's inline formatting; skip when it can't
1221 + # be preserved rather than flattening the heading.
1222 + $new_inner = self::build_heading_inner_html($m[2], $recommended_value);
1223 + if ($new_inner === null) {
1224 + return $m[0];
1225 + }
1226 + return $m[1] . $new_inner . $m[3];
608 1227 },
609 1228 $result_html,
610 1229 -1
611 1230 );
@@ -613,19 +1232,20 @@
613 1232 }
614 1233
615 1234 # CRITICAL FIX: Apply image alt text manually via string replacement
616 1235 # DOM changes via SimpleHtmlDom don't persist on Oxygen/page-builder sites using HTTP render path
617 - $result_html = $this->apply_image_alt_text_via_string($result_html, $replacement_data);
1236 + $result_html = $this->otto_guard_html($this->apply_image_alt_text_via_string($result_html, $replacement_data), $result_html, 'apply_image_alt_text_via_string');
618 1237
619 1238 # Apply insertions — only if DOM insertion didn't already apply it
620 1239 if (!empty($replacement_data['header_html_insertion'])) {
621 - $header_html_check = trim($replacement_data['header_html_insertion']);
1240 + # Escape JSON-LD payload closers and stamp OTTO's blocks first; the DOM
1241 + # path inserts the same bytes, so the already-applied check must compare
1242 + # against the stamped form or it would insert a second copy.
1243 + $header_html_insertion = $this->stamp_otto_json_ld(
1244 + metasync_escape_json_ld_blocks_in_html($replacement_data['header_html_insertion'])
1245 + );
1246 + $header_html_check = trim($header_html_insertion);
622 1247 if (strpos($result_html, $header_html_check) === false) {
623 - $header_html_insertion = preg_replace(
624 - '/<script(\s[^>]*)type\s*=\s*(["\'])application\/ld\+json\2/i',
625 - '<script$1type=$2application/ld+json$2 data-otto="true"',
626 - $replacement_data['header_html_insertion']
627 - );
628 1248 $safe_header = str_replace(array('\\', '$'), array('\\\\', '\\$'), $header_html_insertion);
629 1249 $result_html = preg_replace('/(<\/head>)/i', $safe_header . "\n" . '$1', $result_html, 1);
630 1250 }
631 1251 }
@@ -647,35 +1267,314 @@
647 1267 $safe_footer = str_replace(array('\\', '$'), array('\\\\', '\\$'), $replacement_data['footer_html_insertion']);
648 1268 $result_html = preg_replace('/(<\/html>)/i', $safe_footer . "\n" . '$1', $result_html, 1);
649 1269 }
650 1270
651 - # DEDUPLICATION: Remove duplicate <title>, OG, Twitter tags, canonical, and JSON-LD schema
652 - $result_html = $this->deduplicate_title_tags($result_html);
653 - $result_html = $this->deduplicate_og_twitter_tags($result_html);
654 - $result_html = $this->deduplicate_schema_tags($result_html);
655 - $result_html = $this->deduplicate_canonical_tags($result_html);
1271 + # Apply OTTO's canonical via string replacement (DOM edit is clobbered by the insert_header_html head-freeze; see apply_canonical_via_string).
1272 + $result_html = $this->apply_canonical_via_string($result_html, $replacement_data);
656 1273
657 - # Ensure metasync_optimized attribute on <head> (post-serialization so dom->clear() can't wipe it)
658 - if (!$this->is_amp_page() && strpos($result_html, 'metasync_optimized') === false) {
659 - $result_html = preg_replace('/<head(\s|>)/i', '<head metasync_optimized$1', $result_html, 1);
1274 + # DEDUPLICATION: Remove duplicate <title>, meta description, OG, Twitter tags, canonical, and JSON-LD schema
1275 + $result_html = $this->otto_guard_html($this->deduplicate_title_tags($result_html), $result_html, 'deduplicate_title_tags');
1276 + $result_html = $this->otto_guard_html($this->deduplicate_description_tags($result_html), $result_html, 'deduplicate_description_tags');
1277 + $result_html = $this->otto_guard_html($this->deduplicate_keywords_tags($result_html), $result_html, 'deduplicate_keywords_tags');
1278 + $result_html = $this->otto_guard_html($this->deduplicate_og_twitter_tags($result_html), $result_html, 'deduplicate_og_twitter_tags');
1279 + $result_html = $this->otto_guard_html($this->apply_metabox_og_precedence($result_html), $result_html, 'apply_metabox_og_precedence');
1280 + $result_html = $this->otto_guard_html($this->apply_custom_seo_precedence($result_html), $result_html, 'apply_custom_seo_precedence');
1281 + $result_html = $this->otto_guard_html($this->deduplicate_schema_tags($result_html), $result_html, 'deduplicate_schema_tags');
1282 + $result_html = $this->otto_guard_html($this->deduplicate_canonical_tags($result_html), $result_html, 'deduplicate_canonical_tags');
1283 +
1284 + # Mark the <head> as processed (post-serialization so dom->clear() can't wipe it)
1285 + if (!$this->is_amp_page()) {
1286 + $result_html = $this->mark_head_optimized($result_html);
660 1287 }
661 1288
662 - $result_html = $this->restore_case_sensitive_attributes($result_html);
1289 + $result_html = $this->otto_guard_html($this->restore_case_sensitive_attributes($result_html), $result_html, 'restore_case_sensitive_attributes');
663 1290
664 - # WP-355 / WP-315: Re-inject any <style> blocks lost during processing.
665 - $result_html = $this->restore_lost_style_blocks($result_html, $original_style_blocks);
1291 + # / Re-inject any <style> blocks lost during processing.
1292 + $result_html = $this->otto_guard_html($this->restore_lost_style_blocks($result_html, $original_style_blocks), $result_html, 'restore_lost_style_blocks');
666 1293
667 - # WP-315: Fix Divi 5 shortcode framework class renumbering (HTTP path)
668 - $result_html = $this->fix_divi_class_renumbering($result_html);
1294 + # Fix Divi 5 shortcode framework class renumbering (HTTP path)
1295 + $result_html = $this->otto_guard_html($this->fix_divi_class_renumbering($result_html), $result_html, 'fix_divi_class_renumbering');
669 1296
670 - # WP-315: Clean OTTO internal fetch params from HTML output.
1297 + # Clean OTTO internal fetch params from HTML output.
671 1298 # The HTTP render uses wp_remote_get with ?is_otto_page_fetch=1&otto_block_title=1&otto_block_desc=1
672 1299 # These leak into form action URLs, canonical links, etc. in the rendered HTML.
673 - $result_html = $this->clean_otto_fetch_params($result_html);
1300 + $result_html = $this->otto_guard_html($this->clean_otto_fetch_params($result_html), $result_html, 'clean_otto_fetch_params');
674 1301
1302 + # Remove any lazy-video facade <style> hoisted into the page
1303 + # (runs while srcdoc is still tokenized, so the iframe's own copy is safe).
1304 + $result_html = $this->otto_guard_html($this->strip_hoisted_facade_styles($result_html), $result_html, 'strip_hoisted_facade_styles');
1305 +
1306 + # Restore the original encoded srcdoc values (undo tokenization).
1307 + $result_html = $this->otto_guard_html($this->restore_srcdoc_attributes($result_html, $srcdoc_store), $result_html, 'restore_srcdoc_attributes');
1308 +
1309 + # Keep <meta charset> within the first 1024 bytes so external CSS
1310 + # (e.g. checkmark content:"✓") doesn't mojibake on cached responses.
1311 + $result_html = $this->otto_guard_html($this->ensure_early_charset_meta($result_html), $result_html, 'ensure_early_charset_meta');
1312 +
1313 + # undo double-encoded numeric/hex character references produced by the
1314 + # bundled simplehtmldom serializer from attributes like data-x-icon-s="&#xf3c5".
1315 + $result_html = $this->otto_guard_html($this->repair_double_encoded_entities($result_html), $result_html, 'repair_double_encoded_entities');
1316 +
1317 + # restore literal '&' query-string separators the serializer escaped to
1318 + # '&amp;', which silently truncates multi-family Google Fonts URLs.
1319 + $result_html = $this->otto_guard_html($this->repair_query_string_ampersands($result_html), $result_html, 'repair_query_string_ampersands');
1320 +
1321 + # Remove any lazy-video facade <style> hoisted into the page
1322 + # (runs while srcdoc is still tokenized, so the iframe's own copy is safe).
1323 + $result_html = $this->strip_hoisted_facade_styles($result_html);
1324 +
1325 + # Restore the original encoded srcdoc values (undo tokenization).
1326 + $result_html = $this->restore_srcdoc_attributes($result_html, $srcdoc_store);
1327 +
1328 + # Keep <meta charset> within the first 1024 bytes so external CSS
1329 + # (e.g. checkmark content:"✓") doesn't mojibake on cached responses.
1330 + $result_html = $this->ensure_early_charset_meta($result_html);
1331 +
1332 + # undo double-encoded numeric/hex character references produced by the
1333 + # bundled simplehtmldom serializer from attributes like data-x-icon-s="&#xf3c5".
1334 + $result_html = $this->repair_double_encoded_entities($result_html);
1335 +
675 1336 return $result_html;
676 1337 }
677 1338
1339 + /**
1340 + * Read the final URL from the WordPress HTTP response when Requests has
1341 + * followed one or more redirects. Older HTTP transports may not expose it;
1342 + * in that case the empty result leaves the existing fail-open behavior.
1343 + *
1344 + * @param mixed $response wp_remote_get() response.
1345 + * @return string Final URL, or an empty string when unavailable.
1346 + */
1347 + private function get_effective_fetch_url($response)
1348 + {
1349 + if (!is_array($response) || empty($response['http_response']) || !is_object($response['http_response'])) {
1350 + return '';
1351 + }
1352 +
1353 + $http_response = $response['http_response'];
1354 + if (!method_exists($http_response, 'get_response_object')) {
1355 + return '';
1356 + }
1357 +
1358 + $requests_response = $http_response->get_response_object();
1359 + if (!is_object($requests_response) || empty($requests_response->url) || !is_string($requests_response->url)) {
1360 + return '';
1361 + }
1362 +
1363 + return $requests_response->url;
1364 + }
1365 +
1366 + /**
1367 + * Determine whether a followed response still represents the requested
1368 + * route. The internal fetch may use a rewritten host for tunnel support,
1369 + * so both the original and transport hosts are accepted; the path and
1370 + * non-OTTO query parameters must remain identical.
1371 + *
1372 + * @param string $effective_url Final URL reported by Requests.
1373 + * @param string $route Original route supplied to OTTO.
1374 + * @param string $fetch_url URL actually passed to wp_remote_get().
1375 + * @return bool True when no meaningful redirect changed the route.
1376 + */
1377 + private function fetch_url_matches_route($effective_url, $route, $fetch_url)
1378 + {
1379 + $effective = wp_parse_url($effective_url);
1380 + $requested = wp_parse_url($route);
1381 + $transport = wp_parse_url($fetch_url);
1382 + if (!is_array($effective) || !is_array($requested)) {
1383 + return true;
1384 + }
1385 +
1386 + $effective_path = isset($effective['path']) ? $effective['path'] : '/';
1387 + $requested_path = isset($requested['path']) ? $requested['path'] : '/';
1388 + if ($effective_path !== $requested_path) {
1389 + return false;
1390 + }
1391 +
1392 + $allowed_hosts = [];
1393 + foreach ([$requested, $transport] as $parts) {
1394 + if (!empty($parts['host'])) {
1395 + $host = strtolower($parts['host']);
1396 + if (!empty($parts['port'])) {
1397 + $host .= ':' . $parts['port'];
1398 + }
1399 + $allowed_hosts[] = $host;
1400 + }
1401 + }
1402 + if (!empty($effective['host'])) {
1403 + $effective_host = strtolower($effective['host']);
1404 + if (!empty($effective['port'])) {
1405 + $effective_host .= ':' . $effective['port'];
1406 + }
1407 + if (!empty($allowed_hosts) && !in_array($effective_host, $allowed_hosts, true)) {
1408 + return false;
1409 + }
1410 + }
1411 +
1412 + return $this->without_otto_fetch_params($effective['query'] ?? '')
1413 + === $this->without_otto_fetch_params($requested['query'] ?? '');
1414 + }
1415 +
1416 + /**
1417 + * Remove parameters used only to mark OTTO's internal request.
1418 + *
1419 + * @param string $query Query string without the leading '?'.
1420 + * @return string Query with OTTO markers removed.
1421 + */
1422 + private function without_otto_fetch_params($query)
1423 + {
1424 + $query = (string) $query;
1425 + if ($query === '') {
1426 + return '';
1427 + }
1428 +
1429 + $parts = [];
1430 + foreach (explode('&', $query) as $part) {
1431 + $name = strstr($part, '=', true);
1432 + $name = $name === false ? $part : $name;
1433 + if (in_array($name, ['is_otto_page_fetch', 'otto_block_title', 'otto_block_desc'], true)) {
1434 + continue;
1435 + }
1436 + $parts[] = $part;
1437 + }
1438 +
1439 + return implode('&', $parts);
1440 + }
1441 +
1442 + /**
1443 + * Repair double-encoded character references in serialized HTML.
1444 + *
1445 + * The bundled simplehtmldom serializer (HtmlNode::makeup(), reached via
1446 + * $this->dom->save() and $root->outertext) runs every attribute value through
1447 + * htmlentities(), which escapes the leading '&' of numeric/hex character
1448 + * references. Theme icon attributes such as data-x-icon-s="&#xf3c5"
1449 + * (Themeco X/Cornerstone) therefore become "&amp;#xf3c5", so the browser
1450 + * prints the literal text instead of drawing the icon glyph.
1451 + *
1452 + * Restores only NUMERIC and HEX character references (&#NNN; / &#xHHHH;).
1453 + * Bare ampersands in query strings (?a=1&b=2 -> ?a=1&amp;b=2) and named
1454 + * entities are intentionally left escaped.
1455 + *
1456 + * @param string $html Serialized HTML from save()/outertext.
1457 + * @return string
1458 + */
1459 + private function repair_double_encoded_entities($html) {
1460 + # strpos guard: skip the regex entirely when there is nothing to repair
1461 + if (!is_string($html) || strpos($html, '&amp;#') === false) {
1462 + return $html;
1463 + }
1464 + return preg_replace('/&amp;(#x[0-9a-fA-F]+;?|#[0-9]+;?)/', '&$1', $html);
1465 + }
1466 +
1467 + /**
1468 + * Restore literal '&' query-string separators inside URL attributes.
1469 + *
1470 + * HtmlNode::makeup() serialises every attribute through htmlentities(), so a
1471 + * separator that arrived as a bare '&' - or as '&#038;', which HtmlDocument
1472 + * decodes to '&' when it parses the attribute - is written back as '&amp;'.
1473 + * Both forms decode to '&' in a conforming HTML parser, so the browser is
1474 + * unaffected. A consumer that reads the raw attribute WITHOUT decoding
1475 + * entities sees a different URL, and Cloudflare Fonts is one of those: it
1476 + * refetches fonts.googleapis.com/css2?family=A&amp;family=B, Google treats
1477 + * only the first 'family=' as a real parameter (the rest arrive named
1478 + * 'amp;family'), and every font after the first is dropped from the response.
1479 + * The page keeps its font-family declarations but loses the @font-face rules,
1480 + * so text silently falls back to a system font.
1481 + *
1482 + * Rewrites only a '&amp;' that is immediately followed by a parameter name
1483 + * and '=', and only inside the listed URL attributes. A '&amp;' elsewhere is
1484 + * left escaped, and the mandatory '=' in the lookahead (with ';' excluded
1485 + * from the name class) means no ambiguous ampersand ('&' + alphanumerics +
1486 + * ';') is ever produced.
1487 + *
1488 + * All three delimiter forms the serializer can emit are handled: double
1489 + * quoted, single quoted, and unquoted - makeup() preserves HDOM_QUOTE_NO and
1490 + * emits no delimiter for a value with no whitespace, which is common on
1491 + * minified themes. ENT_COMPAT also leaves "'" unescaped, so a double-quoted
1492 + * value may legitimately contain an apostrophe.
1493 + *
1494 + * The attribute list stops at attributes whose value is always a URL.
1495 + * 'content' is deliberately excluded because it also carries prose
1496 + * (<meta name="description" content="A &amp; B">), where unescaping would
1497 + * corrupt visible text. Attributes read only via JavaScript getAttribute()
1498 + * do not need it either - the DOM decodes entities for them; only consumers
1499 + * that scan raw HTML are affected.
1500 + *
1501 + * <script>/<style>/<textarea>/<noscript> bodies and comments are shielded
1502 + * first. Those are verbatim or RCDATA regions, not markup: rewriting bytes
1503 + * there would edit a JS string literal, or turn "&amp;copy=2" in a textarea
1504 + * into "(c)=2" once the browser decodes it.
1505 + *
1506 + * Plain negated character classes only - no tempered-greedy lookaheads, which
1507 + * blow the PCRE JIT stack on pages with very large inline blocks.
1508 + *
1509 + * @param string $html Serialized HTML from save()/outertext.
1510 + * @return string
1511 + */
1512 + private function repair_query_string_ampersands($html) {
1513 + # strpos guard: skip the regex entirely when there is nothing to repair
1514 + if (strpos($html, '&amp;') === false) {
1515 + return $html;
1516 + }
1517 +
1518 + # Shield verbatim / RCDATA regions and comments before touching anything.
1519 + # Masking also shrinks large inline blocks to a token, so the attribute
1520 + # pass never walks them.
1521 + $shielded = array();
1522 + $masked = preg_replace_callback(
1523 + '/<(script|style|textarea|noscript)\b[^>]*>.*?<\/\1>|<!--.*?-->/is',
1524 + function ($m) use (&$shielded) {
1525 + $token = '<!--METASYNC_QSA_' . count($shielded) . '-->';
1526 + $shielded[$token] = $m[0];
1527 + return $token;
1528 + },
1529 + $html
1530 + );
1531 +
1532 + # preg_* returns null on a PCRE failure; keep the original document.
1533 + if ($masked === null) {
1534 + return $html;
1535 + }
1536 +
1537 + $repaired = preg_replace_callback(
1538 + '/(\s(?:href|src|srcset|data-src|data-srcset|poster|action)\s*=\s*)(?:"([^"<>]*)"|\'([^\'<>]*)\'|([^\s"\'<>]+))/i',
1539 + function ($m) {
1540 + # Pick the delimiter branch that matched. An empty value carries
1541 + # no query string, so the ambiguity between an empty quoted value
1542 + # and an unset group cannot change the outcome.
1543 + if (isset($m[4]) && $m[4] !== '') { // @phpstan-ignore notIdentical.alwaysTrue (preg fills non-participating groups with '' - this check is what tells the unquoted branch from the quoted ones)
1544 + $quote = '';
1545 + $value = $m[4];
1546 + } elseif (isset($m[3]) && $m[3] !== '') {
1547 + $quote = "'";
1548 + $value = $m[3];
1549 + } else {
1550 + $quote = '"';
1551 + $value = isset($m[2]) ? $m[2] : '';
1552 + }
1553 +
1554 + # Only a value carrying a query string can hold separators.
1555 + if (strpos($value, '?') === false || strpos($value, '&amp;') === false) {
1556 + return $m[0];
1557 + }
1558 +
1559 + $fixed = preg_replace('/&amp;(?=[A-Za-z0-9_.\[\]%\-]+=)/', '&', $value);
1560 +
1561 + if ($fixed === null) {
1562 + return $m[0];
1563 + }
1564 +
1565 + return $m[1] . $quote . $fixed . $quote;
1566 + },
1567 + $masked
1568 + );
1569 +
1570 + if ($repaired === null) {
1571 + return $html;
1572 + }
1573 +
1574 + return empty($shielded) ? $repaired : strtr($repaired, $shielded);
1575 + }
1576 +
678 1577 # do the footer html insertion
679 1578 function do_footer_html_insertion($replacement_data){
680 1579
681 1580 # check that we have footer html
@@ -776,9 +1675,9 @@
776 1675 if (empty($images)) {
777 1676 return;
778 1677 }
779 1678
780 - # WP-425: index suggestions by URL path as well, so images authored with
1679 + # index suggestions by URL path as well, so images authored with
781 1680 # relative srcs still match OTTO's absolute-URL keys (and vice versa).
782 1681 $alt_lookup = $this->build_image_alt_lookup($image_data);
783 1682
784 1683 # PERFORMANCE OPTIMIZATION: O(n²) reduced to O(n)
@@ -817,9 +1716,9 @@
817 1716 }
818 1717 }
819 1718 }
820 1719
821 - # WP-425: memoized site host — home_url() runs its filter chain on every
1720 + # memoized site host — home_url() runs its filter chain on every
822 1721 # call and these helpers run per suggestion and per img.
823 1722 private ?string $site_host_cache = null;
824 1723
825 1724 /**
@@ -835,9 +1734,9 @@
835 1734 return $this->site_host_cache;
836 1735 }
837 1736
838 1737 /**
839 - * WP-425: Candidate lookup keys for an image URL — the URL itself plus,
1738 + * Candidate lookup keys for an image URL — the URL itself plus,
840 1739 * for relative URLs or absolute/protocol-relative URLs on this site's
841 1740 * host, the bare URL path. URLs on a different host only ever match
842 1741 * exactly, so a same path on a foreign host cannot produce a false match.
843 1742 *
@@ -865,9 +1764,9 @@
865 1764 return $variants;
866 1765 }
867 1766
868 1767 /**
869 - * WP-425: Build the image alt lookup keyed by every URL variant of each
1768 + * Build the image alt lookup keyed by every URL variant of each
870 1769 * OTTO suggestion, so relative img srcs match absolute suggestion URLs.
871 1770 *
872 1771 * @param array $image_data OTTO body_substitutions.images map (url => alt)
873 1772 * @return array Expanded lookup (url-or-path => alt)
@@ -889,9 +1788,9 @@
889 1788 return $lookup;
890 1789 }
891 1790
892 1791 /**
893 - * WP-425: Resolve the OTTO alt text for an img src, trying the exact src
1792 + * Resolve the OTTO alt text for an img src, trying the exact src
894 1793 * first and then its same-host path variant.
895 1794 *
896 1795 * @param array $lookup Expanded lookup from build_image_alt_lookup()
897 1796 * @param string $image_src The img element's src attribute
@@ -954,9 +1853,9 @@
954 1853 *
955 1854 * Known limitation (pre-existing): the `<img[^>]*src=` pattern can match a
956 1855 * `data-src`/`data-lazy-src` attribute that ends with the target URL before
957 1856 * the real `src`, mis-attributing the alt on lazy-loaded markup. Tracked as
958 - * a follow-up to WP-425.
1857 + * a follow-up to.
959 1858 *
960 1859 * @param string $html The HTML to process
961 1860 * @param array $replacement_data The replacement data containing body_substitutions.images
962 1861 * @return string Modified HTML with alt text applied
@@ -966,9 +1865,9 @@
966 1865 return $html;
967 1866 }
968 1867
969 1868 foreach ($replacement_data['body_substitutions']['images'] as $image_url => $alt_text) {
970 - # WP-425: prefilter and match on the same-host path variant too, so
1869 + # prefilter and match on the same-host path variant too, so
971 1870 # relative img srcs match OTTO's absolute suggestion URLs.
972 1871 $src_pattern = $this->get_image_src_pattern($image_url);
973 1872
974 1873 if (empty($alt_text) || $src_pattern === null || strpos($html, $src_pattern['needle']) === false) {
@@ -1023,9 +1922,9 @@
1023 1922 return $html;
1024 1923 }
1025 1924
1026 1925 /**
1027 - * WP-425: Build the src match for an OTTO image suggestion URL.
1926 + * Build the src match for an OTTO image suggestion URL.
1028 1927 *
1029 1928 * For relative URLs or absolute/protocol-relative URLs on this site's
1030 1929 * host, the regex matches the URL path with an optional scheme+host
1031 1930 * prefix — so a relative img src matches an absolute suggestion URL and
@@ -1031,9 +1930,10 @@
1031 1930 * prefix — so a relative img src matches an absolute suggestion URL and
1032 1931 * vice versa. URLs on a foreign host keep the original exact match, so a
1033 1932 * same path on a different host cannot produce a false positive.
1034 1933 *
1035 - * @param string $image_url OTTO suggestion URL
1934 + * @param string|int $image_url OTTO suggestion URL (may arrive as an int
1935 + * when it originates from an array key that PHP coerced)
1036 1936 * @return array|null ['needle' => strpos prefilter string,
1037 1937 * 'pattern' => regex fragment ('/' delimiter)] or null
1038 1938 */
1039 1939 private function get_image_src_pattern($image_url) {
@@ -1078,15 +1978,28 @@
1078 1978
1079 1979 # check matching text
1080 1980 if(trim($heading['current_value'] ?? '') == trim($text ?? '')){
1081 1981
1082 - # replace entire tag output — preserves attributes, removes all children (elements + text nodes)
1982 + # Rebuild the inner HTML, keeping the author's inline
1983 + # formatting. Returns null when the markup can't be preserved
1984 + # unambiguously — leave that heading alone rather than strip
1985 + # its <span style>/<em>/<br> and restyle the page.
1986 + $new_inner = self::build_heading_inner_html(
1987 + $heading_old->innertext,
1988 + $heading['recommended_value']
1989 + );
1990 +
1991 + if ($new_inner === null) {
1992 + continue;
1993 + }
1994 +
1995 + # replace the tag output, preserving the opening tag's attributes
1083 1996 $outer = $heading_old->outertext;
1084 1997 $open_end = strpos($outer, '>');
1085 1998 if ($open_end !== false) {
1086 1999 $open_tag = substr($outer, 0, $open_end + 1);
1087 2000 $close_tag = '</' . $heading['type'] . '>';
1088 - $heading_old->outertext = $open_tag . $heading['recommended_value'] . $close_tag;
2001 + $heading_old->outertext = $open_tag . $new_inner . $close_tag;
1089 2002 }
1090 2003
1091 2004 }
1092 2005 }
@@ -1188,10 +2101,10 @@
1188 2101 }
1189 2102
1190 2103 # If it's a protocol-relative URL (//example.com), check if it matches our domain
1191 2104 if (strpos($url, '//') === 0) {
1192 - $parsed_home = parse_url($home_url);
1193 - $parsed_link = parse_url($url);
2105 + $parsed_home = wp_parse_url($home_url);
2106 + $parsed_link = wp_parse_url($url);
1194 2107
1195 2108 if (isset($parsed_home['host']) && isset($parsed_link['host'])) {
1196 2109 if (strtolower($parsed_home['host']) === strtolower($parsed_link['host'])) {
1197 2110 return false;
@@ -1291,8 +2204,194 @@
1291 2204 # now do the actual html replacements
1292 2205 $body->outertext = '<body' . $attributes_string . '>'.$insert_data['body_top_html_insertion'].$body->innertext . '</body>';
1293 2206 }
1294 2207
2208 + /**
2209 + * Resolve the current singular post id reliably inside the OTTO output
2210 + * buffer / direct-render context.
2211 + *
2212 + * get_the_ID() depends on the global $post/loop state, which is not reliable
2213 + * once WordPress has finished rendering and the buffer/shutdown pass runs.
2214 + * get_queried_object_id() reads the parsed main query and stays correct there
2215 + * (same approach as apply_metabox_og_precedence()). Restricted to
2216 + * singular views: on archives/home the queried object id can be a term or
2217 + * user id, which must not be read as post meta.
2218 + *
2219 + * @return int Post id, or 0 when not applicable.
2220 + */
2221 + private function get_buffer_post_id() {
2222 + if (!function_exists('is_singular') || !is_singular()) {
2223 + return 0;
2224 + }
2225 + $post_id = function_exists('get_queried_object_id') ? get_queried_object_id() : 0;
2226 + return $post_id ? (int) $post_id : 0;
2227 + }
2228 +
2229 + /**
2230 + * Replace the first <meta $attr="$val"> content with $content_escaped.
2231 + *
2232 + * @param string $html
2233 + * @param string $attr "name" or "property"
2234 + * @param string $val e.g. "description", "og:description"
2235 + * @param string $content_escaped Already HTML-escaped content value
2236 + * @param string $marker Provenance marker for the winning tier
2237 + * @return string
2238 + */
2239 + private function force_custom_meta($html, $attr, $val, $content_escaped, $marker = 'custom') {
2240 + $marker_attribute = $marker === 'otto'
2241 + ? ' data-metasync-otto="true"'
2242 + : ' data-metasync-seo="custom"';
2243 + $tag = '<meta ' . $attr . '="' . $val . '" content="' . $content_escaped . '"' . $marker_attribute . ' />';
2244 + # The optional prefix group must end on whitespace or a quote so the
2245 + # attribute matched is $attr itself, not something merely ending in it:
2246 + # a bare [^>]*name= also matches data-name="keywords", so a third party's
2247 + # unrelated tag was consumed and rewritten while the real one survived —
2248 + # destroying their value AND leaving the duplicate the dedup had just
2249 + # collapsed. Making the group optional keeps the common
2250 + # <meta name="..." ...> form matching, where <meta\s has already consumed
2251 + # the only separator. Same rule as deduplicate_keywords_tags(); this
2252 + # helper serves title, description and keywords, so all three are covered.
2253 + $pattern = '/<meta\s(?:[^>]*[\s"\'])?' . preg_quote($attr, '/') . '\s*=\s*["\']' . preg_quote($val, '/') . '["\'][^>]*\/?>/i';
2254 + $count = 0;
2255 + $new = preg_replace_callback($pattern, function ($m) use ($tag) {
2256 + return $tag;
2257 + }, $html, 1, $count);
2258 + if ($count > 0) {
2259 + return $new;
2260 + }
2261 + # None present — insert after <head>.
2262 + return preg_replace_callback('/(<head[^>]*>)/i', function ($m) use ($tag) {
2263 + return $m[1] . "\n" . $tag;
2264 + }, $html, 1);
2265 + }
2266 +
2267 + /**
2268 + * Make sure the precedence resolver is loaded before calling it.
2269 + *
2270 + * @return bool
2271 + */
2272 + private static function precedence_available() {
2273 + if (class_exists('Metasync_Seo_Precedence')) {
2274 + return true;
2275 + }
2276 +
2277 + $file = dirname(__DIR__) . '/includes/class-metasync-seo-precedence.php';
2278 + if (is_readable($file)) {
2279 + require_once $file;
2280 + }
2281 +
2282 + return class_exists('Metasync_Seo_Precedence');
2283 + }
2284 +
2285 + /**
2286 + * Enforce the resolved SEO title, description and keywords as the FINAL
2287 + * word over OTTO.
2288 + *
2289 + * The resolver owns the global custom-versus-OTTO order. This final buffer
2290 + * pass must use it too: otherwise the setting works through the sidebar
2291 + * and third-party filters but OTTO's later string pass puts the custom
2292 + * value back on the page.
2293 + *
2294 + * OG and Twitter descriptions remain outside this method deliberately;
2295 + * social precedence is a separate follow-up scope.
2296 + *
2297 + * @param string $html Full HTML document (post-dedup).
2298 + * @return string
2299 + */
2300 + private function apply_custom_seo_precedence($html) {
2301 + if ($html === '') {
2302 + return $html;
2303 + }
2304 + $post_id = $this->get_buffer_post_id();
2305 + if (!$post_id) {
2306 + return $html;
2307 + }
2308 +
2309 + # This runs inside the output buffer, where an unresolvable class is a
2310 + # fatal that takes the whole page down — otto_guard_html() only catches
2311 + # a NULL return, not a thrown Error. A partial update can leave newer
2312 + # PHP files beside an older committed autoload classmap, so resolve the
2313 + # file directly before trusting the class, and leave the document
2314 + # untouched if it is genuinely absent. Same reasoning as
2315 + # Metasync_SEO_Conflict_Handler::precedence_available().
2316 + if (!self::precedence_available()) {
2317 + return $html;
2318 + }
2319 +
2320 + # Title — replace the resolved page title into the (single, post-dedup) <title>.
2321 + $resolved_title = Metasync_Seo_Precedence::resolve(
2322 + $post_id,
2323 + Metasync_Seo_Precedence::FIELD_TITLE
2324 + );
2325 + if (!empty($resolved_title['value'])) {
2326 + $title_tag = '<title>' . htmlspecialchars($resolved_title['value'], ENT_QUOTES, 'UTF-8') . '</title>';
2327 + $count = 0;
2328 + $replaced = preg_replace_callback('/<title[^>]*>.*?<\/title>/is', function ($m) use ($title_tag) {
2329 + return $title_tag;
2330 + }, $html, 1, $count);
2331 + if ($count > 0) {
2332 + $html = $replaced;
2333 + } elseif (stripos($html, '<title') === false) {
2334 + $html = preg_replace_callback('/(<head[^>]*>)/i', function ($m) use ($title_tag) {
2335 + return $m[1] . "\n" . $title_tag;
2336 + }, $html, 1);
2337 + }
2338 + }
2339 +
2340 + # Description — replace the resolved page description into the SEO
2341 + # <meta name="description"> only. OG/Twitter description is social
2342 + # precedence and remains outside this setting's scope.
2343 + $resolved_description = Metasync_Seo_Precedence::resolve(
2344 + $post_id,
2345 + Metasync_Seo_Precedence::FIELD_DESCRIPTION
2346 + );
2347 + if (!empty($resolved_description['value'])) {
2348 + $esc = htmlspecialchars($resolved_description['value'], ENT_QUOTES, 'UTF-8');
2349 + $marker = Metasync_Seo_Precedence::is_otto_value(
2350 + $post_id,
2351 + Metasync_Seo_Precedence::FIELD_DESCRIPTION,
2352 + $resolved_description
2353 + )
2354 + ? 'otto'
2355 + : 'custom';
2356 + $html = $this->force_custom_meta($html, 'name', 'description', $esc, $marker);
2357 + }
2358 +
2359 + # Keywords — the same final pass as the description above, on the chain
2360 + # the resolver owns, so the global priority setting governs this tag
2361 + # too. OTTO's keywords tag arrives via header_html_insertion carrying
2362 + # a data-otto marker and is spliced in after wp_head, so it is always
2363 + # the later tag and always wins deduplicate_keywords_tags(); forcing
2364 + # the resolved winner here is what keeps the losing tier reachable at
2365 + # all — the single-printing-owner rule the description branch follows.
2366 + #
2367 + # The tier this forces is NOT guaranteed customer-typed, unlike the
2368 + # title and description keys above: the meta_keywords persistence flag
2369 + # writes OTTO's value straight to _metasync_focus_keyword, and neither
2370 + # that conditional write nor the clone cleaner (which strips only the
2371 + # _metasync_otto_* keys) ever clears it, so a stale flag copy can
2372 + # outrank a newer suggestion under custom-first. That key sharing is
2373 + # tracked separately — the fix is a key of its own for the persisted
2374 + # keyword, not a special case here.
2375 + $resolved_keyword = Metasync_Seo_Precedence::resolve(
2376 + $post_id,
2377 + Metasync_Seo_Precedence::FIELD_FOCUS_KEYWORD
2378 + );
2379 + if (!empty($resolved_keyword['value'])) {
2380 + $esc = htmlspecialchars($resolved_keyword['value'], ENT_QUOTES, 'UTF-8');
2381 + $marker = Metasync_Seo_Precedence::is_otto_value(
2382 + $post_id,
2383 + Metasync_Seo_Precedence::FIELD_FOCUS_KEYWORD,
2384 + $resolved_keyword
2385 + )
2386 + ? 'otto'
2387 + : 'custom';
2388 + $html = $this->force_custom_meta($html, 'name', 'keywords', $esc, $marker);
2389 + }
2390 +
2391 + return $html;
2392 + }
2393 +
1295 2394 # this function does the header replacements
1296 2395 function do_header_replacements($replacement_data){
1297 2396
1298 2397 # check that we have header replacements
@@ -1342,21 +2441,19 @@
1342 2441
1343 2442 # handle canonical links
1344 2443 if($data['type'] == 'link' && $data['rel'] === 'canonical'){
1345 2444
1346 - # Protect manually-set canonical from OTTO override
2445 + # Protect manually-set canonical from OTTO override.
2446 + # Validated: a legacy row corrupted to "Array" must not
2447 + # count as a manual canonical and block OTTO's correct value.
1347 2448 if (function_exists('is_singular') && is_singular()) {
1348 2449 $post_id = get_the_ID();
1349 2450 if ($post_id) {
1350 - $custom_canonical = get_post_meta($post_id, '_metasync_canonical_url', true);
1351 - if (empty($custom_canonical)) {
1352 - $custom_canonical = get_post_meta($post_id, 'meta_canonical', true);
1353 - // Handle legacy array values
1354 - if (is_array($custom_canonical)) {
1355 - $custom_canonical = reset($custom_canonical) ?: '';
1356 - }
2451 + $custom_canonical = Metasync_Canonical_Sanitizer::sanitize(get_post_meta($post_id, '_metasync_canonical_url', true));
2452 + if ($custom_canonical === '') {
2453 + $custom_canonical = Metasync_Canonical_Sanitizer::sanitize(get_post_meta($post_id, 'meta_canonical', true));
1357 2454 }
1358 - if (!empty($custom_canonical)) {
2455 + if ($custom_canonical !== '') {
1359 2456 # Manual canonical takes priority — skip OTTO override
1360 2457 continue;
1361 2458 }
1362 2459 }
@@ -1364,11 +2461,15 @@
1364 2461
1365 2462 # find the cannonical dom element
1366 2463 $link = $this->dom->find('link[rel="canonical"]', 0);
1367 2464
1368 - # set the link property if not empty
2465 + # set the link property if not empty — only to a validated URL
2466 + # never inject a corrupted/non-URL suggestion.
1369 2467 if(!empty($link->href)){
1370 - $link->href = $data['recommended_value'] ?? $link->href;
2468 + $otto_canonical = Metasync_Canonical_Sanitizer::sanitize($data['recommended_value'] ?? '');
2469 + if ($otto_canonical !== '') {
2470 + $link->href = $otto_canonical;
2471 + }
1371 2472 }
1372 2473
1373 2474 #
1374 2475 continue;
@@ -1691,8 +2792,221 @@
1691 2792 return $html;
1692 2793 }
1693 2794
1694 2795 /**
2796 + * Read one of the meta box's social title/description keys with the "Auto Draft"
2797 + * placeholder collapsed to ''.
2798 + *
2799 + * Delegates to Metasync_OpenGraph so the placeholder definition lives in one
2800 + * place. Falls back to a raw read when that class — or that method on it — is
2801 + * unavailable: this buffer filter runs on the front end, and a partially updated
2802 + * install can pair a newer otto/ file with an older includes/ one, where calling
2803 + * a method the loaded class doesn't define would fatal the page rather than
2804 + * degrade.
2805 + *
2806 + * @param int $post_id
2807 + * @param string $key
2808 + * @return string
2809 + */
2810 + private function social_meta($post_id, $key) {
2811 + // PHPStan resolves the literal class-string against the current source and so
2812 + // sees the method as always present; the check is deliberate runtime
2813 + // version-skew defence. Suppressed the same way otto_pixel.php does.
2814 + // @phpstan-ignore-next-line function.alreadyNarrowedType
2815 + if (method_exists('Metasync_OpenGraph', 'get_social_meta')) {
2816 + return Metasync_OpenGraph::get_social_meta($post_id, $key);
2817 + }
2818 + return (string) get_post_meta($post_id, $key, true);
2819 + }
2820 +
2821 + /**
2822 + * Apply the per-post "Social Media & Open Graph" meta box precedence over OTTO.
2823 + *
2824 + * Precedence per tag: an explicit meta box value set by the user wins over OTTO;
2825 + * a field left blank falls back to OTTO's value; if OTTO also has none, a sensible
2826 + * default fills the gap. Mirrors how the custom SEO sidebar values take priority
2827 + * over OTTO (see do_header_replacements()).
2828 + *
2829 + * Runs *after* deduplicate_og_twitter_tags(), and only within <head>. For a field the
2830 + * user explicitly set it removes any existing tag (OTTO's) and re-adds the user's
2831 + * value; for the rest it only adds a tag when absent — so OTTO stays authoritative
2832 + * where the user left a field blank and no duplicate is produced. OTTO never emits an
2833 + * og:image, so this also surfaces a user-set social image on an OTTO-managed page.
2834 + *
2835 + * Only applies to singular posts/pages: the meta box values are per-post, and on
2836 + * archives/home get_queried_object_id() can return a term or user id.
2837 + *
2838 + * @param string $html Full HTML document (post-dedup).
2839 + * @return string
2840 + */
2841 + private function apply_metabox_og_precedence($html) {
2842 + if (!function_exists('get_queried_object_id') || !function_exists('is_singular')) {
2843 + return $html;
2844 + }
2845 + # Per-post OG only applies to singular posts/pages. On archives/home the queried
2846 + # object id can be a term or user id, which must not be read as post meta.
2847 + if (!is_singular()) {
2848 + return $html;
2849 + }
2850 + $post_id = get_queried_object_id();
2851 + if (!$post_id) {
2852 + return $html;
2853 + }
2854 +
2855 + # Respect the meta box opt-out (only an explicit '0' disables it)
2856 + if (get_post_meta($post_id, '_metasync_og_enabled', true) === '0') {
2857 + return $html;
2858 + }
2859 +
2860 + # Explicit (user-typed) meta box values. A non-empty value means the user set
2861 + # this field themselves and it must take priority over OTTO.
2862 + #
2863 + # The four social title/description keys are read through
2864 + # Metasync_OpenGraph::get_social_meta(), which collapses the "Auto Draft"
2865 + # placeholder to ''. Without that, a row polluted by the meta box pre-fill on a
2866 + # brand-new post reads as a deliberate override here (it differs from the real
2867 + # title) and would beat OTTO's correct og:title.
2868 + $og_title_set = $this->social_meta($post_id, '_metasync_og_title');
2869 + $og_desc_set = $this->social_meta($post_id, '_metasync_og_description');
2870 + $og_image_set = get_post_meta($post_id, '_metasync_og_image', true);
2871 + $og_type_set = get_post_meta($post_id, '_metasync_og_type', true);
2872 + $tw_card_set = get_post_meta($post_id, '_metasync_twitter_card', true);
2873 + $tw_site_set = get_post_meta($post_id, '_metasync_twitter_site', true);
2874 + $tw_title_set = $this->social_meta($post_id, '_metasync_twitter_title');
2875 + $tw_desc_set = $this->social_meta($post_id, '_metasync_twitter_description');
2876 + $tw_image_set = get_post_meta($post_id, '_metasync_twitter_image', true);
2877 + $tw_image_alt_set = get_post_meta($post_id, '_metasync_twitter_image_alt', true);
2878 +
2879 + # Default OG values the meta box pre-fills (post title / generated excerpt /
2880 + # featured image). The meta box PERSISTS these defaults on save, so a non-empty
2881 + # _metasync_og_* value alone does not prove the user customized it — a field is a
2882 + # genuine override only when its stored value differs from this default. Reuse the
2883 + # emitter's own resolver so the defaults match exactly (falling back to empty
2884 + # defaults, i.e. treat nothing as customized, if the instance is unavailable).
2885 + $defaults = ['title' => '', 'description' => '', 'image' => ''];
2886 + if (class_exists('Metasync_OpenGraph') && Metasync_OpenGraph::get_instance()) {
2887 + $defaults = Metasync_OpenGraph::get_instance()->get_default_og_values($post_id);
2888 + }
2889 +
2890 + $title_is_custom = ($og_title_set !== '' && $og_title_set !== $defaults['title']);
2891 + $desc_is_custom = ($og_desc_set !== '' && $og_desc_set !== $defaults['description']);
2892 + $image_is_custom = ($og_image_set !== '' && $og_image_set !== $defaults['image']);
2893 +
2894 + # Resolved values (explicit value first, then the meta box default).
2895 + $og_title = $og_title_set !== '' ? $og_title_set : $defaults['title'];
2896 + $og_desc = $og_desc_set !== '' ? $og_desc_set : $defaults['description'];
2897 + $og_image = $og_image_set !== '' ? $og_image_set : $defaults['image'];
2898 + $og_type = $og_type_set ?: 'article';
2899 + $site_name = get_bloginfo('name');
2900 +
2901 + # Twitter inherits the OG value when its own field is blank; a user-customized
2902 + # og:image therefore also overrides OTTO's twitter:image (the meta box treats them
2903 + # as one). A twitter field is custom if its own value differs from the default OR
2904 + # the OG field it inherits was customized.
2905 + $tw_card = $tw_card_set ?: 'summary_large_image';
2906 + $tw_title = $tw_title_set !== '' ? $tw_title_set : $og_title;
2907 + $tw_desc = $tw_desc_set !== '' ? $tw_desc_set : $og_desc;
2908 + $tw_image = $tw_image_set !== '' ? $tw_image_set : $og_image;
2909 +
2910 + $tw_title_is_custom = ($tw_title_set !== '' && $tw_title_set !== $defaults['title']) || $title_is_custom;
2911 + $tw_desc_is_custom = ($tw_desc_set !== '' && $tw_desc_set !== $defaults['description']) || $desc_is_custom;
2912 + $tw_image_is_custom = ($tw_image_set !== '' && $tw_image_set !== $defaults['image']) || $image_is_custom;
2913 +
2914 + # twitter:site: per-post value, else the site-wide handle from Social Meta settings.
2915 + # twitter:site / twitter:image:alt are not auto-defaulted by the meta box, so a
2916 + # non-empty per-post value is itself the override signal.
2917 + $tw_site = $tw_site_set;
2918 + if ($tw_site === '' && class_exists('Metasync')) {
2919 + $social = Metasync::get_option('social_meta');
2920 + if (is_array($social) && !empty($social['twitter_username'])) {
2921 + $tw_site = '@' . ltrim($social['twitter_username'], '@');
2922 + }
2923 + }
2924 +
2925 + # og:type / twitter:card are dropdowns that always carry a value, so they override
2926 + # OTTO only when the user picked a non-default option. og:url is auto-populated with
2927 + # the permalink on save, so it is fill-only (never an override) to avoid clobbering
2928 + # OTTO's canonical URL with a stale/auto value. og:site_name is a site default.
2929 + $og_type_override = ($og_type_set !== '' && $og_type_set !== 'article');
2930 + $tw_card_override = ($tw_card_set !== '' && $tw_card_set !== 'summary_large_image');
2931 +
2932 + # [attr, property/name, value, is_url, is_override]
2933 + $tags = [
2934 + ['property', 'og:title', $og_title, false, $title_is_custom],
2935 + ['property', 'og:description', $og_desc, false, $desc_is_custom],
2936 + ['property', 'og:image', $og_image, true, $image_is_custom],
2937 + ['property', 'og:url', get_permalink($post_id), true, false],
2938 + ['property', 'og:type', $og_type, false, $og_type_override],
2939 + ['property', 'og:site_name', $site_name, false, false],
2940 + ['name', 'twitter:card', $tw_card, false, $tw_card_override],
2941 + ['name', 'twitter:site', $tw_site, false, $tw_site_set !== ''],
2942 + ['name', 'twitter:title', $tw_title, false, $tw_title_is_custom],
2943 + ['name', 'twitter:description', $tw_desc, false, $tw_desc_is_custom],
2944 + ['name', 'twitter:image', $tw_image, true, $tw_image_is_custom],
2945 + ['name', 'twitter:image:alt', $tw_image_alt_set, false, $tw_image_alt_set !== ''],
2946 + ];
2947 +
2948 + # Operate only within <head> so meta tags in the body are never touched.
2949 + if (!preg_match('/(<head\b[^>]*>)(.*?)(<\/head>)/is', $html, $hm)) {
2950 + return $html;
2951 + }
2952 + $head = $hm[2];
2953 +
2954 + # 1) Remove existing head tags for user-overridden properties so the user's value wins.
2955 + foreach ($tags as $t) {
2956 + list($attr, $key, $val, $is_url, $is_override) = $t;
2957 + if ($is_override && $val !== '' && $val !== null) {
2958 + $stripped = preg_replace(
2959 + '/<meta\s[^>]*' . $attr . '\s*=\s*(["\'])' . preg_quote($key, '/') . '\1[^>]*>\s*/i',
2960 + '',
2961 + $head
2962 + );
2963 + if ($stripped !== null) {
2964 + $head = $stripped;
2965 + }
2966 + }
2967 + }
2968 +
2969 + # 2) Build additions: overrides (removed above) + gap-fills for anything still absent.
2970 + #
2971 + # When a third-party SEO plugin is active the conflict handler may have suppressed
2972 + # that plugin's og:title / twitter:title so MetaSync can supply the replacement
2973 + # (Metasync_SEO_Sidebar::output_seo_meta_description). Gap-filling those two tags
2974 + # here would inject the meta-box post-title default over that replacement, so skip
2975 + # them in that case. User-customized overrides are unaffected — they were already
2976 + # applied above.
2977 + $seo_plugin_active = class_exists('Metasync_SEO_Conflict_Handler')
2978 + && Metasync_SEO_Conflict_Handler::get_instance()->has_active_seo_plugin();
2979 +
2980 + $additions = '';
2981 + foreach ($tags as $t) {
2982 + list($attr, $key, $val, $is_url, $is_override) = $t;
2983 + if ($val === '' || $val === null) {
2984 + continue;
2985 + }
2986 + if (!$is_override && $seo_plugin_active && ($key === 'og:title' || $key === 'twitter:title')) {
2987 + continue; # never gap-fill the post title over a third-party plugin's own title
2988 + }
2989 + if (!$is_override && preg_match('/<meta\s[^>]*' . $attr . '\s*=\s*(["\'])' . preg_quote($key, '/') . '\1/i', $head)) {
2990 + continue; # OTTO (or another source) already provides it and the user did not override
2991 + }
2992 + $content = $is_url ? esc_url($val) : esc_attr($val);
2993 + if ($content === '') {
2994 + continue;
2995 + }
2996 + $marker = $is_override ? 'override' : 'fill';
2997 + $additions .= '<meta ' . $attr . '="' . $key . '" content="' . $content . '" data-metasync-og="' . $marker . '">' . "\n";
2998 + }
2999 +
3000 + # Reassemble the head block (str_replace avoids backreference issues from $ in values).
3001 + if ($head === $hm[2] && $additions === '') {
3002 + return $html; # nothing removed, nothing added
3003 + }
3004 + $new_head_block = $hm[1] . $head . $additions . $hm[3];
3005 + return str_replace($hm[0], $new_head_block, $html);
3006 + }
3007 +
3008 + /**
1695 3009 * Deduplicate meta tags by a specific attribute (property= or name=).
1696 3010 *
1697 3011 * When duplicates exist and one carries a data-otto marker, keep only
1698 3012 * the OTTO version. Otherwise keep the first occurrence.
@@ -1712,21 +3026,176 @@
1712 3026 }
1713 3027
1714 3028 $all_tags = $matches[0];
1715 3029
1716 - # Find the OTTO tag (has data-otto-pixel or data-otto attribute)
3030 + # Choose the keeper by precedence: custom sidebar → OTTO → first.
3031 + # A user-set SEO sidebar value (data-metasync-seo="custom") must win over
3032 + # OTTO, matching deduplicate_description_tags() and the sidebar's documented
3033 + # "custom always wins over OTTO" intent. Without this, the generic keeper
3034 + # (OTTO-or-first) drops the sidebar's og:/twitter: description in favor of
3035 + # OTTO's injected tag.
3036 + $custom_tag = null;
1717 3037 $otto_tag = null;
1718 3038 foreach ($all_tags as $tag) {
1719 - if (stripos($tag, 'data-otto') !== false) {
3039 + if ($custom_tag === null && stripos($tag, 'data-metasync-seo') !== false) {
3040 + $custom_tag = $tag;
3041 + }
3042 + if ($otto_tag === null && stripos($tag, 'data-otto') !== false) {
1720 3043 $otto_tag = $tag;
3044 + }
3045 + }
3046 +
3047 + # Determine the keeper: custom sidebar tag, else OTTO tag, else the first tag
3048 + $keeper = $custom_tag ?: ($otto_tag ?: $all_tags[0]);
3049 +
3050 + # Remove all occurrences, then re-insert the keeper at the first position
3051 + $first_replaced = false;
3052 + $html = preg_replace_callback($pattern, function ($m) use ($keeper, &$first_replaced) {
3053 + if (!$first_replaced) {
3054 + $first_replaced = true;
3055 + return $keeper;
3056 + }
3057 + return ''; # Remove subsequent duplicates
3058 + }, $html);
3059 +
3060 + return $html;
3061 + }
3062 +
3063 + /**
3064 + * Deduplicate <meta name="description"> tags after OTTO processing.
3065 + *
3066 + * Unlike title, og, twitter, and canonical tags, the plain name="description"
3067 + * tag had NO dedup pass, so a page could end up with 2-3 copies when several
3068 + * subsystems each emit one:
3069 + * - OTTO backend payload (header_html_insertion) → data-otto-pixel="dynamic-seo"
3070 + * (spliced in additively before </head>, never replacing an existing tag)
3071 + * - MetaSync's persisted-meta wp_head hook → data-metasync-otto="true"
3072 + * - MetaSync SEO sidebar custom value → data-metasync-seo="custom"
3073 + *
3074 + * This runs at the buffer level — after every source has written its tag —
3075 + * and keeps exactly ONE, by precedence (matching the SEO sidebar's documented
3076 + * "custom always wins over OTTO" intent):
3077 + * 1. custom sidebar (data-metasync-seo)
3078 + * 2. OTTO (data-otto-pixel OR data-metasync-otto OR data-otto)
3079 + * 3. first occurrence
3080 + *
3081 + * Note: the generic deduplicate_meta_by_attr() keeper-detection only matches
3082 + * substring "data-otto", which misses "data-metasync-otto"; this method checks
3083 + * both OTTO markers explicitly, so either OTTO source is recognized.
3084 + *
3085 + * @param string $html Full HTML document.
3086 + * @return string HTML with at most one <meta name="description">.
3087 + */
3088 + private function deduplicate_description_tags($html) {
3089 + if (!is_string($html) || $html === '') {
3090 + return $html;
3091 + }
3092 +
3093 + # Match <meta ... name="description" ...> in either attribute order.
3094 + # [^>]* is bounded to a single tag; name="twitter:description" is NOT matched
3095 + # because the opening quote must be immediately followed by "description".
3096 + $pattern = '/<meta\s[^>]*name\s*=\s*["\']description["\'][^>]*\/?>/i';
3097 +
3098 + if (preg_match_all($pattern, $html, $matches) <= 1) {
3099 + return $html; # 0 or 1 — nothing to deduplicate
3100 + }
3101 +
3102 + $all_tags = $matches[0];
3103 +
3104 + # Choose the keeper by precedence: custom sidebar → OTTO → first.
3105 + $custom_tag = null;
3106 + $otto_tag = null;
3107 + foreach ($all_tags as $tag) {
3108 + if ($custom_tag === null && stripos($tag, 'data-metasync-seo') !== false) {
3109 + $custom_tag = $tag;
3110 + }
3111 + if ($otto_tag === null && (
3112 + stripos($tag, 'data-otto-pixel') !== false ||
3113 + stripos($tag, 'data-metasync-otto') !== false ||
3114 + stripos($tag, 'data-otto') !== false
3115 + )) {
3116 + $otto_tag = $tag;
3117 + }
3118 + }
3119 + $keeper = $custom_tag ?: ($otto_tag ?: $all_tags[0]);
3120 +
3121 + # Remove all occurrences, re-inserting the keeper at the first position.
3122 + # Callback form avoids backreference injection when the description content
3123 + # contains $ followed by digits (e.g. "$50 off").
3124 + $first_replaced = false;
3125 + $html = preg_replace_callback($pattern, function ($m) use ($keeper, &$first_replaced) {
3126 + if (!$first_replaced) {
3127 + $first_replaced = true;
3128 + return $keeper;
3129 + }
3130 + return ''; # Remove subsequent duplicates
3131 + }, $html);
3132 +
3133 + return $html;
3134 + }
3135 +
3136 + /**
3137 + * Remove duplicate <meta name="keywords"> tags from HTML.
3138 + *
3139 + * OTTO ships its keywords tag inside header_html_insertion, and MetaSync's
3140 + * own SEO output now emits one too whenever the precedence chain resolves a
3141 + * keyword — so a server-side-rendered page can carry both.
3142 + *
3143 + * The keeper is OTTO's tag, or the first occurrence when no OTTO tag is
3144 + * present. Unlike deduplicate_description_tags() there is no
3145 + * customer-authored branch here: print_metatag() emits no data attribute, so
3146 + * a keywords tag never carries data-metasync-seo="custom" at this point in
3147 + * the pipeline. The customer tier is re-applied afterwards by
3148 + * apply_custom_seo_precedence(), which runs later and stamps the marker via
3149 + * force_custom_meta(). Collapsing to OTTO's tag here is therefore safe: it is
3150 + * not the final word on what the page renders.
3151 + *
3152 + * @param string $html Full HTML document.
3153 + * @return string HTML with at most one <meta name="keywords">.
3154 + */
3155 + private function deduplicate_keywords_tags($html) {
3156 + # No is_string() guard, unlike deduplicate_description_tags() beside it.
3157 + # That asymmetry is forced, not an oversight: @param string makes the
3158 + # check provably always-true at PHPStan level 5, and the description
3159 + # sibling's copy is one of a fixed number of occurrences the baseline
3160 + # pins by count, so adding another fails the build. Both methods are
3161 + # only ever called with the buffer string.
3162 + if ($html === '') {
3163 + return $html;
3164 + }
3165 +
3166 + # Match <meta ... name="keywords" ...> in either attribute order.
3167 + #
3168 + # The optional prefix group must end on whitespace or a quote so the
3169 + # attribute is `name`, not something merely ending in it: a bare
3170 + # [^>]*name= also matches data-name="keywords". Making the group
3171 + # optional keeps the common `<meta name="keywords" ...>` form matching,
3172 + # where <meta\s has already consumed the only separator.
3173 + #
3174 + # The opening quote must be immediately followed by "keywords", so
3175 + # name="news_keywords" is not matched.
3176 + $pattern = '/<meta\s(?:[^>]*[\s"\'])?name\s*=\s*["\']keywords["\'][^>]*\/?>/i';
3177 +
3178 + if (preg_match_all($pattern, $html, $matches) <= 1) {
3179 + return $html; # 0 or 1 — nothing to deduplicate
3180 + }
3181 +
3182 + $all_tags = $matches[0];
3183 +
3184 + $otto_tag = null;
3185 + foreach ($all_tags as $tag) {
3186 + if (stripos($tag, 'data-otto-pixel') !== false ||
3187 + stripos($tag, 'data-metasync-otto') !== false ||
3188 + stripos($tag, 'data-otto') !== false
3189 + ) {
3190 + $otto_tag = $tag;
1721 3191 break;
1722 3192 }
1723 3193 }
1724 -
1725 - # Determine the keeper: OTTO tag if present, otherwise the first tag
1726 3194 $keeper = $otto_tag ?: $all_tags[0];
1727 3195
1728 - # Remove all occurrences, then re-insert the keeper at the first position
3196 + # Callback form avoids backreference injection when the keyword list
3197 + # contains $ followed by digits.
1729 3198 $first_replaced = false;
1730 3199 $html = preg_replace_callback($pattern, function ($m) use ($keeper, &$first_replaced) {
1731 3200 if (!$first_replaced) {
1732 3201 $first_replaced = true;
@@ -1780,96 +3249,301 @@
1780 3249 return $html;
1781 3250 }
1782 3251
1783 3252 /**
3253 + * Normalize a JSON-LD `@type` into a list of lowercased type tokens.
3254 + *
3255 + * JSON-LD allows `@type` to be a string OR an array of strings, and Rank Math
3256 + * routinely emits multi-typed nodes (e.g. ["WebPage", "CollectionPage"]).
3257 + * Collapsing such a node to its first token hides it from a plain-typed
3258 + * duplicate, so every token is returned and indexed separately.
3259 + *
3260 + * @param mixed $raw The raw `@type` value.
3261 + * @return string[] Unique lowercased tokens, possibly empty.
3262 + */
3263 + private function schema_type_tokens($raw) {
3264 + $tokens = [];
3265 +
3266 + foreach ((is_array($raw) ? $raw : [$raw]) as $type) {
3267 + if (is_array($type) || is_object($type) || is_bool($type) || $type === null) {
3268 + continue;
3269 + }
3270 + $type = strtolower(trim((string) $type));
3271 + if ($type === '') {
3272 + continue;
3273 + }
3274 + $tokens[$type] = true;
3275 + }
3276 +
3277 + return array_keys($tokens);
3278 + }
3279 +
3280 + /**
1784 3281 * Deduplicate JSON-LD schema blocks.
1785 3282 *
1786 - * When OTTO and a third-party SEO plugin both inject <script type="application/ld+json">
1787 - * blocks, keep OTTO's version for any @type that appears in both.
1788 - * Third-party blocks whose @type is not covered by OTTO are preserved.
3283 + * Two nodes collide when they share an `@id`, or when one claims an `@type`
3284 + * token the page already carries. Collisions resolve strictly in OTTO's
3285 + * favour:
1789 3286 *
3287 + * - an OTTO node (marked `data-otto`) displaces every colliding
3288 + * third-party node, whichever appeared first in the document;
3289 + * - two OTTO nodes describing the same entity keep the first;
3290 + * - two third-party nodes never evict each other, even when they share a
3291 + * type: a Yoast graph legitimately carries two distinct ImageObjects,
3292 + * and MetaSync's own breadcrumb / local-business blocks are third-party
3293 + * output this pass has no mandate to fold.
3294 + *
3295 + * When OTTO contributed no node at all the document comes back untouched —
3296 + * a third-party-only page is not ours to rewrite. Edits are offset splices
3297 + * into the original document, so a block that loses nothing keeps its exact
3298 + * bytes (attributes, `class`, `@context`, position — head, body or footer)
3299 + * and nothing is ever relocated.
3300 + *
3301 + * Blocks are left exactly where they are when their JSON does not parse,
3302 + * when they carry neither `@type` nor `@graph`, or when they sit inside an
3303 + * HTML comment or <noscript> — a schema node the site disabled by wrapping
3304 + * it in a comment must stay disabled, not be re-published by this pass.
3305 + *
1790 3306 * @param string $html Full HTML.
1791 3307 * @return string
1792 3308 */
1793 3309 private function deduplicate_schema_tags($html) {
1794 - // Find all JSON-LD script blocks
1795 - $pattern = '/<script(\s[^>]*)type\s*=\s*(["\'])application\/ld\+json\2[^>]*>\s*([\s\S]*?)<\/script>/i';
1796 - if (preg_match_all($pattern, $html, $matches, PREG_SET_ORDER) <= 1) {
3310 + // Find all JSON-LD script blocks. Group 1 is the FULL attribute string —
3311 + // capturing only the part before `type=` would hide a `data-otto` marker
3312 + // that sits after it, which is where every insertion path puts it. The
3313 + // type VALUE is prefix-matched so `application/ld+json; charset=UTF-8`
3314 + // is recognised too.
3315 + $pattern = '/<script(\s[^>]*type\s*=\s*(["\'])application\/ld\+json[^"\'>]*\2[^>]*)>\s*([\s\S]*?)<\/script>/i';
3316 + if (!preg_match_all($pattern, $html, $matches, PREG_SET_ORDER | PREG_OFFSET_CAPTURE)) {
1797 3317 return $html;
1798 3318 }
1799 3319
1800 - $otto_by_type = []; // @type => decoded JSON object
1801 - $third_by_type = []; // @type => decoded JSON object
1802 - $otto_graph = []; // entries from OTTO @graph blocks
1803 - $third_graph = []; // entries from third-party @graph blocks
3320 + // Byte ranges this pass must not reach into. A commented-out (or
3321 + // <noscript>-wrapped) schema block is deliberately disabled output.
3322 + $masked = [];
3323 + if (preg_match_all('/<!--[\s\S]*?-->|<noscript\b[^>]*>[\s\S]*?<\/noscript>/i', $html, $comments, PREG_SET_ORDER | PREG_OFFSET_CAPTURE)) {
3324 + foreach ($comments as $comment) {
3325 + $masked[] = [$comment[0][1], $comment[0][1] + strlen($comment[0][0])];
3326 + }
3327 + }
1804 3328
3329 + // `data-otto` must be a whole attribute: `data-otto="true"` or a bare
3330 + // `data-otto`. A substring test would also catch a hypothetical
3331 + // `data-otto-thing="x"` and misattribute that block to OTTO.
3332 + $is_otto_attr = '/(^|\s)data-otto(\s*=|\s|$)/i';
3333 +
3334 + // Blocks able to take part, and their entities in document order. An
3335 + // entity is one addressable node: a flat block's document, one
3336 + // `@graph` entry, or one node of a top-level array.
3337 + $blocks = [];
3338 + $entities = [];
3339 +
1805 3340 foreach ($matches as $m) {
1806 - $attrs = $m[1];
1807 - $json_str = $m[3];
3341 + $start = $m[0][1];
3342 + foreach ($masked as $range) {
3343 + if ($start >= $range[0] && $start < $range[1]) {
3344 + continue 2;
3345 + }
3346 + }
3347 +
3348 + $attrs = $m[1][0];
3349 + $json_str = $m[3][0];
1808 3350 $decoded = json_decode($json_str, true);
1809 3351 if (json_last_error() !== JSON_ERROR_NONE || !is_array($decoded)) {
1810 - continue; // skip unparseable blocks — leave them in place
3352 + continue; // unparseable — leave the block in place
1811 3353 }
1812 - $is_otto = stripos($attrs, 'data-otto') !== false;
1813 3354
3355 + $is_otto = preg_match($is_otto_attr, $attrs) === 1;
3356 + $end = $start + strlen($m[0][0]);
3357 +
3358 + // A trailing newline swallowed on full removal keeps the output tidy.
3359 + $end_ws = $end;
3360 + if (substr($html, $end, 2) === "\r\n") {
3361 + $end_ws = $end + 2;
3362 + } elseif (substr($html, $end, 1) === "\n") {
3363 + $end_ws = $end + 1;
3364 + }
3365 +
3366 + $register = function (array $node) use (&$entities, $is_otto) {
3367 + // Keyed like metasync_otto_structured_entity_key(): @id first,
3368 + // @type tokens for the type fold. Entries with neither stay in
3369 + // their block but cannot collide, so they keep entity === null.
3370 + $types = isset($node['@type']) ? $this->schema_type_tokens($node['@type']) : [];
3371 + $id = (!empty($node['@id']) && is_string($node['@id'])) ? '@id:' . strtolower(trim($node['@id'])) : '';
3372 + if ($types === [] && $id === '') {
3373 + return null;
3374 + }
3375 + $entities[] = ['otto' => $is_otto, 'types' => $types, 'id' => $id, 'alive' => true];
3376 + return count($entities) - 1;
3377 + };
3378 +
3379 + $block = ['start' => $start, 'end' => $end, 'end_ws' => $end_ws, 'attrs' => $attrs, 'decoded' => $decoded, 'items' => []];
3380 +
1814 3381 if (isset($decoded['@graph']) && is_array($decoded['@graph'])) {
1815 - foreach ($decoded['@graph'] as $entry) {
1816 - if (!isset($entry['@type'])) continue;
1817 - // JSON-LD allows @type to be a string OR an array of strings.
1818 - // Rank Math routinely emits multi-typed entries (e.g. ["Person", "Organization"]).
1819 - // Using an array as an offset throws a fatal on PHP 8+, so normalize to scalar.
1820 - $type = is_array($entry['@type'])
1821 - ? (string) reset($entry['@type'])
1822 - : (string) $entry['@type'];
1823 - if ($type === '') continue;
1824 - if ($is_otto) {
1825 - $otto_graph[$type] = $entry;
1826 - } else {
1827 - $third_graph[$type] = $entry;
1828 - }
3382 + foreach ($decoded['@graph'] as $node) {
3383 + $block['items'][] = ['node' => $node, 'e' => is_array($node) ? $register($node) : null];
1829 3384 }
3385 + $block['shape'] = 'graph';
1830 3386 } elseif (isset($decoded['@type'])) {
1831 - $type = is_array($decoded['@type'])
1832 - ? (string) reset($decoded['@type'])
1833 - : (string) $decoded['@type'];
1834 - if ($type === '') continue;
1835 - if ($is_otto) {
1836 - $otto_by_type[$type] = $decoded;
3387 + $block['shape'] = 'flat';
3388 + $block['items'][] = ['node' => $decoded, 'e' => $register($decoded)];
3389 + } elseif (isset($decoded[0])) {
3390 + // A bare top-level array: [{"@type":"WebPage",...}, ...]. The
3391 + // persistence path already folds this shape; the render path
3392 + // used to skip it entirely, leaving its duplicates standing.
3393 + $block['shape'] = 'list';
3394 + foreach ($decoded as $node) {
3395 + $block['items'][] = ['node' => $node, 'e' => is_array($node) ? $register($node) : null];
3396 + }
3397 + } else {
3398 + continue; // neither @type nor @graph nor array — nothing to key on
3399 + }
3400 +
3401 + $blocks[] = $block;
3402 + }
3403 +
3404 + foreach ($entities as $entity) {
3405 + if ($entity['otto']) {
3406 + $otto_present = true;
3407 + break;
3408 + }
3409 + }
3410 + if (empty($otto_present)) {
3411 + return $html; // OTTO contributed no schema — a third-party page is not ours to rewrite
3412 + }
3413 +
3414 + // Fold. Type claims map a token to EVERY alive holder, so a later OTTO
3415 + // node can displace a whole set of third-party duplicates at once.
3416 + /** @var array<string, int> $by_id */
3417 + $by_id = []; // '@id:...' => entity index
3418 + /** @var array<string, int[]> $by_type */
3419 + $by_type = []; // type token => entity index[]
3420 +
3421 + $release = function ($i) use (&$by_id, &$by_type, &$entities) {
3422 + foreach ($entities[$i]['types'] as $token) {
3423 + $holders = $by_type[$token] ?? [];
3424 + $holders = array_values(array_diff($holders, [$i]));
3425 + if ($holders === []) {
3426 + unset($by_type[$token]);
1837 3427 } else {
1838 - $third_by_type[$type] = $decoded;
3428 + $by_type[$token] = $holders;
1839 3429 }
1840 3430 }
3431 + $id = $entities[$i]['id'];
3432 + if ($id !== '' && ($by_id[$id] ?? -1) === $i) {
3433 + unset($by_id[$id]);
3434 + }
3435 + };
3436 +
3437 + foreach ($entities as $i => $entity) {
3438 + $alive = true;
3439 +
3440 + // The same real-world entity twice, whatever @type each copy carries.
3441 + if ($entity['id'] !== '' && isset($by_id[$entity['id']])) {
3442 + $occupant = $by_id[$entity['id']];
3443 + if ($entity['otto'] && !$entities[$occupant]['otto']) {
3444 + $entities[$occupant]['alive'] = false;
3445 + $release($occupant);
3446 + unset($by_id[$entity['id']]); // re-claimed below if the entity survives
3447 + } else {
3448 + $alive = false; // first copy stands (OTTO's, or the earlier OTTO's)
3449 + }
3450 + }
3451 +
3452 + if ($alive) {
3453 + foreach ($entity['types'] as $token) {
3454 + $holders = $by_type[$token] ?? [];
3455 + if ($holders === []) {
3456 + continue;
3457 + }
3458 + $otto_holder = false;
3459 + foreach ($holders as $holder) {
3460 + if ($entities[$holder]['otto']) {
3461 + $otto_holder = true;
3462 + break;
3463 + }
3464 + }
3465 + if ($otto_holder) {
3466 + $alive = false; // an OTTO node already holds this token
3467 + break;
3468 + }
3469 + if ($entity['otto']) {
3470 + // OTTO displaces every third-party holder of the token and
3471 + // releases ALL their claims, not just this one — otherwise
3472 + // tokens the evicted node held alone would stay blocked and
3473 + // later, legitimate nodes of that type would lose.
3474 + foreach ($holders as $holder) {
3475 + $entities[$holder]['alive'] = false;
3476 + $release($holder);
3477 + }
3478 + }
3479 + // Third party meeting third-party holders: both stand.
3480 + }
3481 + }
3482 +
3483 + if ($alive) {
3484 + foreach ($entity['types'] as $token) {
3485 + $by_type[$token][] = $i;
3486 + }
3487 + if ($entity['id'] !== '') {
3488 + $by_id[$entity['id']] = $i;
3489 + }
3490 + } else {
3491 + $entities[$i]['alive'] = false;
3492 + }
1841 3493 }
1842 3494
1843 - // If OTTO provided no schema at all, nothing to deduplicate
1844 - if (empty($otto_by_type) && empty($otto_graph)) {
1845 - return $html;
3495 + $any_evicted = false;
3496 + foreach ($entities as $entity) {
3497 + if (!$entity['alive']) {
3498 + $any_evicted = true;
3499 + break;
3500 + }
1846 3501 }
3502 + if (!$any_evicted) {
3503 + return $html; // no collision — every original byte stays
3504 + }
1847 3505
1848 - // Remove all JSON-LD blocks from HTML
1849 - $html = preg_replace($pattern, '', $html);
3506 + // Rebuild only the blocks that lost something, back-to-front so the
3507 + // recorded offsets of earlier blocks stay valid.
3508 + $edits = [];
3509 + foreach ($blocks as $block) {
3510 + $kept = [];
3511 + $lost = 0;
3512 + foreach ($block['items'] as $item) {
3513 + if ($item['e'] === null || $entities[$item['e']]['alive']) {
3514 + $kept[] = $item['node'];
3515 + } else {
3516 + $lost++;
3517 + }
3518 + }
3519 + if ($lost === 0) {
3520 + continue;
3521 + }
3522 + if ($kept === []) {
3523 + $edits[] = [$block['start'], $block['end_ws'], ''];
3524 + continue;
3525 + }
1850 3526
1851 - // Re-insert flat (non-@graph) blocks: OTTO wins for matching @type
1852 - $kept = array_merge($otto_by_type, array_diff_key($third_by_type, $otto_by_type));
1853 - $rebuilt = '';
1854 - foreach ($kept as $decoded) {
1855 - $rebuilt .= '<script type="application/ld+json" data-otto="true">' .
1856 - wp_json_encode($decoded) . "</script>\n";
1857 - }
3527 + if ($block['shape'] === 'list') {
3528 + $payload = $kept;
3529 + } else { // graph — a flat block that lost its only entity is removed above
3530 + $payload = $block['decoded'];
3531 + $payload['@graph'] = $kept;
3532 + }
1858 3533
1859 - // Re-insert merged @graph block (if any entries exist)
1860 - $merged_graph = array_merge($third_graph, $otto_graph); // OTTO wins on duplicate @type
1861 - if (!empty($merged_graph)) {
1862 - $graph_obj = ['@context' => 'https://schema.org', '@graph' => array_values($merged_graph)];
1863 - $rebuilt .= '<script type="application/ld+json" data-otto="true">' .
1864 - wp_json_encode($graph_obj) . "</script>\n";
3534 + $json = metasync_safe_json_ld_encode($payload, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
3535 + if (!is_string($json) || $json === '') {
3536 + continue; // never drop a block whose payload failed to re-encode
3537 + }
3538 +
3539 + // The original attribute string is reused verbatim so class, id and
3540 + // the data-otto marker itself survive the rebuild.
3541 + $edits[] = [$block['start'], $block['end'], '<script' . $block['attrs'] . '>' . $json . '</script>'];
1865 3542 }
1866 3543
1867 - // Re-inject before </head>
1868 - if (!empty($rebuilt)) {
1869 - $html = preg_replace_callback('/(<\/head>)/i', function ($m) use ($rebuilt) {
1870 - return $rebuilt . $m[1];
1871 - }, $html, 1);
3544 + foreach (array_reverse($edits) as $edit) {
3545 + $html = substr($html, 0, $edit[0]) . $edit[2] . substr($html, $edit[1]);
1872 3546 }
1873 3547
1874 3548 return $html;
1875 3549 }
@@ -1888,14 +3562,14 @@
1888 3562 return true;
1889 3563 }
1890 3564
1891 3565 # Check if amp=1 query parameter is present
1892 - if (isset($_GET['amp']) && $_GET['amp'] == '1') {
3566 + if (isset($_GET['amp']) && $_GET['amp'] == '1') { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only AMP detection
1893 3567 return true;
1894 3568 }
1895 3569
1896 3570 # Check for other common AMP query parameters
1897 - if (isset($_GET['amp']) && !empty($_GET['amp'])) {
3571 + if (isset($_GET['amp']) && !empty($_GET['amp'])) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only AMP detection
1898 3572 return true;
1899 3573 }
1900 3574
1901 3575 return false;
@@ -1900,8 +3574,32 @@
1900 3574
1901 3575 return false;
1902 3576 }
1903 3577
3578 + # function to mark OTTO's own JSON-LD blocks so deduplicate_schema_tags() can
3579 + # tell them apart from a third-party SEO plugin's blocks. Every insertion path
3580 + # (DOM, string fallback, HTTP fallback) runs the fragment through this so the
3581 + # bytes they insert are identical and the "already applied" checks still match.
3582 + private function stamp_otto_json_ld($html){
3583 +
3584 + $stamped = preg_replace_callback(
3585 + '/<script(\s[^>]*type\s*=\s*(["\'])application\/ld\+json[^"\'>]*\2[^>]*)>/i',
3586 + function ($m) {
3587 + # idempotent: a block already carrying a data-otto attribute —
3588 + # anywhere in the tag, not just before `type` — is left alone,
3589 + # never given a second one
3590 + if (preg_match('/(^|\s)data-otto(\s|=|$)/i', $m[1])) {
3591 + return $m[0];
3592 + }
3593 + return '<script' . $m[1] . ' data-otto="true">';
3594 + },
3595 + $html
3596 + );
3597 +
3598 + # preg_replace returns null on a PCRE failure — never hand back less than we got
3599 + return is_string($stamped) ? $stamped : $html;
3600 + }
3601 +
1904 3602 # this function insterts header html to the dom
1905 3603 function insert_header_html($data){
1906 3604
1907 3605 # check that we have the header html
@@ -1914,20 +3612,27 @@
1914 3612 $head = $this->dom->find('head', 0);
1915 3613
1916 3614 if ($head) {
1917 3615
1918 - # Check if this is an AMP page - if so, don't add metasync_optimized attribute
3616 + # Check if this is an AMP page - if so, skip the processed marker
1919 3617 $is_amp_page = $this->is_amp_page();
1920 3618
1921 - # Append the new HTML at the start of the <head> tag
1922 - # For AMP pages: use clean <head> tag without metasync_optimized attribute
1923 - # For non-AMP pages: add metasync_optimized attribute to <head> tag
1924 - if ($is_amp_page) {
1925 - $head->outertext = '<head>' .$data['header_html_insertion']. $head->innertext . '</head>';
1926 - } else {
1927 - $head->outertext = '<head metasync_optimized>' .$data['header_html_insertion']. $head->innertext . '</head>';
1928 - }
3619 + # Append the new HTML at the start of the <head> tag. The tag itself
3620 + # stays a literal '<head>' either way, so plugins that inject with a
3621 + # literal str_replace('<head>', ...) still match the real tag —
3622 + # see mark_head_optimized() for what breaks when it does not.
3623 + $marker = $is_amp_page ? '' : self::HEAD_OPTIMIZED_MARKER;
1929 3624
3625 + # Escape JSON-LD payload closers so a `</script>` inside a JSON
3626 + # string value cannot terminate the element early (XSS/page corruption).
3627 + # Then stamp the blocks as OTTO's, exactly as the string and HTTP
3628 + # fallbacks do, so the deduper can attribute them.
3629 + $escaped_header_insertion = $this->stamp_otto_json_ld(
3630 + metasync_escape_json_ld_blocks_in_html($data['header_html_insertion'])
3631 + );
3632 +
3633 + $head->outertext = '<head>' . $marker . $escaped_header_insertion . $head->innertext . '</head>';
3634 +
1930 3635 }
1931 3636
1932 3637 # save and reload DOM
1933 3638 $this->save_reload();
@@ -2044,8 +3749,35 @@
2044 3749
2045 3750 }
2046 3751
2047 3752 /**
3753 + * Explicitly free the SimpleHtmlDom node tree and reclaim memory.
3754 + *
3755 + * SimpleHtmlDom nodes hold circular parent/child references, so simply
3756 + * dropping the document does not free the tree until request shutdown.
3757 + * HtmlNode::clear() breaks those cycles; we then drop the document, force a
3758 + * GC pass, and re-instantiate a fresh empty parser so the instance stays
3759 + * reusable for any subsequent route on the same request.
3760 + */
3761 + function free_dom(){
3762 + if (isset($this->dom)) {
3763 + # Break the node tree's parent/child cycles so GC can reclaim it now.
3764 + if (isset($this->dom->root) && is_object($this->dom->root)
3765 + && method_exists($this->dom->root, 'clear')) {
3766 + $this->dom->root->clear();
3767 + }
3768 + unset($this->dom);
3769 + }
3770 +
3771 + # Fresh, empty parser — mirrors the constructor so the object is reusable.
3772 + $this->dom = new HtmlDocument(null, true, true, 'UTF-8', false);
3773 +
3774 + if (function_exists('gc_collect_cycles')) {
3775 + gc_collect_cycles();
3776 + }
3777 + }
3778 +
3779 + /**
2048 3780 * Process HTML directly without HTTP request (for buffer approach)
2049 3781 * This is the FAST path - eliminates the internal wp_remote_get call
2050 3782 *
2051 3783 * CRITICAL: This method is called from the output buffer callback.
@@ -2067,20 +3799,39 @@
2067 3799 if (stripos($html, '<html') === false && stripos($html, '<!DOCTYPE') === false) {
2068 3800 return false;
2069 3801 }
2070 3802
3803 + # Skip DOM processing on oversized documents to avoid fatal OOM.
3804 + # Returning false makes the buffer callback serve the original HTML
3805 + # unmodified — the page still renders, just without OTTO changes.
3806 + if (class_exists('Metasync_Otto_Render_Strategy')
3807 + && !Metasync_Otto_Render_Strategy::is_document_processable(strlen($html))
3808 + ) {
3809 + Metasync_Otto_Render_Strategy::log_oversized_skip('process_html_directly', strlen($html));
3810 + return false;
3811 + }
3812 +
2071 3813 # Remove XML declaration if present
2072 3814 $html = preg_replace('/<\?xml[^?]*\?>\s*/i', '', $html);
2073 3815
2074 - # WP-355 / WP-315: Save ALL original <style> blocks before DOM processing.
3816 + # / Save ALL original <style> blocks before DOM processing.
2075 3817 $original_style_blocks = $this->capture_style_blocks($html);
2076 3818
3819 + # Shield entity-encoded srcdoc values (lazy YouTube/video facades)
3820 + # so SimpleHtmlDom can't decode them and hoist their global <style> into <head>.
3821 + $srcdoc_store = array();
3822 + $html = $this->protect_srcdoc_attributes($html, $srcdoc_store);
3823 +
2077 3824 # Escape bare < in text content before DOM parsing
2078 3825 $html = $this->sanitize_text_less_than($html);
2079 3826
2080 - # WP-355: Fix malformed self-closing non-void tags (e.g. <ul/ class="...">)
3827 + # Fix malformed self-closing non-void tags (e.g. <ul/ class="...">)
2081 3828 $html = $this->fix_malformed_self_closing_tags($html);
2082 3829
3830 + # Quote unquoted attribute values (e.g. data-autoplay-viewport=80%) —
3831 + # SimpleHtmlDom swallows every following attribute into such a value.
3832 + $html = $this->quote_unquoted_attribute_values($html);
3833 +
2083 3834 # Load HTML into DOM
2084 3835 $this->dom->load($html, true, false);
2085 3836
2086 3837 # Force UTF-8 charset to preserve emojis and special characters
@@ -2262,15 +4013,16 @@
2262 4013 }
2263 4014
2264 4015 # Apply header HTML insertion (for schema, etc.) — only if DOM insertion didn't already apply it
2265 4016 if (!empty($replacement_data['header_html_insertion'])) {
2266 - $header_html_check = trim($replacement_data['header_html_insertion']);
4017 + # Escape JSON-LD payload closers and stamp OTTO's blocks first; the DOM
4018 + # path inserts the same bytes, so the already-applied check must compare
4019 + # against the stamped form or it would insert a second copy.
4020 + $header_html_insertion = $this->stamp_otto_json_ld(
4021 + metasync_escape_json_ld_blocks_in_html($replacement_data['header_html_insertion'])
4022 + );
4023 + $header_html_check = trim($header_html_insertion);
2267 4024 if (strpos($result_html, $header_html_check) === false) {
2268 - $header_html_insertion = preg_replace(
2269 - '/<script(\s[^>]*)type\s*=\s*(["\'])application\/ld\+json\2/i',
2270 - '<script$1type=$2application/ld+json$2 data-otto="true"',
2271 - $replacement_data['header_html_insertion']
2272 - );
2273 4025 $header_html = str_replace(array('\\', '$'), array('\\\\', '\\$'), $header_html_insertion);
2274 4026 # Insert before </head>
2275 4027 $result_html = preg_replace('/(<\/head>)/i', $header_html . "\n" . '$1', $result_html, 1);
2276 4028 }
@@ -2325,9 +4077,9 @@
2325 4077 }
2326 4078
2327 4079 # CRITICAL FIX: Apply image alt text manually via string replacement
2328 4080 # DOM changes don't persist, must use string replacement
2329 - $result_html = $this->apply_image_alt_text_via_string($result_html, $replacement_data);
4081 + $result_html = $this->otto_guard_html($this->apply_image_alt_text_via_string($result_html, $replacement_data), $result_html, 'apply_image_alt_text_via_string');
2330 4082
2331 4083 # String-based heading fallback for body_substitutions
2332 4084 # DOM changes via SimpleHtmlDom don't persist on Divi/page-builder sites
2333 4085 if (!empty($replacement_data['body_substitutions']['headings']) && is_array($replacement_data['body_substitutions']['headings'])) {
@@ -2342,13 +4094,19 @@
2342 4094
2343 4095 $result_html = preg_replace_callback(
2344 4096 '/(<' . $heading_type . '(?:\s[^>]*)?>)(.*?)(<\/' . $heading_type . '>)/is',
2345 4097 function ($m) use ($current_value, $recommended_value) {
2346 - $inner_text = trim(preg_replace('/\s+/', ' ', html_entity_decode(strip_tags($m[2]), ENT_QUOTES, 'UTF-8')));
2347 - if ($inner_text === $current_value) {
2348 - return $m[1] . $recommended_value . $m[3];
4098 + $inner_text = trim(preg_replace('/\s+/', ' ', html_entity_decode(wp_strip_all_tags($m[2]), ENT_QUOTES, 'UTF-8')));
4099 + if ($inner_text !== $current_value) {
4100 + return $m[0];
2349 4101 }
2350 - return $m[0];
4102 + # Keep the author's inline formatting; skip when it can't
4103 + # be preserved rather than flattening the heading.
4104 + $new_inner = self::build_heading_inner_html($m[2], $recommended_value);
4105 + if ($new_inner === null) {
4106 + return $m[0];
4107 + }
4108 + return $m[1] . $new_inner . $m[3];
2351 4109 },
2352 4110 $result_html,
2353 4111 -1
2354 4112 );
@@ -2390,50 +4148,115 @@
2390 4148 $result_html
2391 4149 );
2392 4150 }
2393 4151
2394 - # DEDUPLICATION: Remove duplicate <title>, OG, Twitter tags, canonical, and JSON-LD schema
2395 - $result_html = $this->deduplicate_title_tags($result_html);
2396 - $result_html = $this->deduplicate_og_twitter_tags($result_html);
2397 - $result_html = $this->deduplicate_schema_tags($result_html);
2398 - $result_html = $this->deduplicate_canonical_tags($result_html);
4152 + # Apply OTTO's canonical via string replacement (DOM edit is clobbered by the insert_header_html head-freeze; see apply_canonical_via_string).
4153 + $result_html = $this->apply_canonical_via_string($result_html, $replacement_data);
2399 4154
4155 + # DEDUPLICATION: Remove duplicate <title>, meta description, OG, Twitter tags, canonical, and JSON-LD schema
4156 + $result_html = $this->otto_guard_html($this->deduplicate_title_tags($result_html), $result_html, 'deduplicate_title_tags');
4157 + $result_html = $this->otto_guard_html($this->deduplicate_description_tags($result_html), $result_html, 'deduplicate_description_tags');
4158 + $result_html = $this->otto_guard_html($this->deduplicate_keywords_tags($result_html), $result_html, 'deduplicate_keywords_tags');
4159 + $result_html = $this->otto_guard_html($this->deduplicate_og_twitter_tags($result_html), $result_html, 'deduplicate_og_twitter_tags');
4160 + $result_html = $this->otto_guard_html($this->apply_metabox_og_precedence($result_html), $result_html, 'apply_metabox_og_precedence');
4161 + $result_html = $this->otto_guard_html($this->apply_custom_seo_precedence($result_html), $result_html, 'apply_custom_seo_precedence');
4162 + $result_html = $this->otto_guard_html($this->deduplicate_schema_tags($result_html), $result_html, 'deduplicate_schema_tags');
4163 + $result_html = $this->otto_guard_html($this->deduplicate_canonical_tags($result_html), $result_html, 'deduplicate_canonical_tags');
4164 +
2400 4165 # MEMORY OPTIMIZED: Free all large objects and arrays before returning
2401 4166 # This ensures memory is released immediately, especially important for high-traffic sites
2402 4167 unset($final_meta_matches, $matches);
2403 4168
2404 - # Clear SimpleHtmlDom internal cache to free memory
2405 - # Note: We don't unset $this->dom as the object may be reused
2406 - if ($this->dom && method_exists($this->dom, 'clear')) {
2407 - $this->dom->clear();
2408 - }
4169 + # Explicitly free the SimpleHtmlDom node tree now that the
4170 + # result has been serialized to a string. The bundled HtmlDocument has
4171 + # no clear() method, so the previous method_exists() guard was a no-op
4172 + # and the (circular-referenced) node tree lingered until object
4173 + # destruction. free_dom() breaks those references and reclaims memory.
4174 + $this->free_dom();
2409 4175
2410 4176 # Clear element cache array
2411 4177 $this->cached_elements = [];
2412 4178
2413 - # Ensure metasync_optimized attribute on <head> (post-serialization so dom->clear() can't wipe it)
2414 - if (!$this->is_amp_page() && strpos($result_html, 'metasync_optimized') === false) {
2415 - $result_html = preg_replace('/<head(\s|>)/i', '<head metasync_optimized$1', $result_html, 1);
4179 + # Mark the <head> as processed (post-serialization so dom->clear() can't wipe it)
4180 + if (!$this->is_amp_page()) {
4181 + $result_html = $this->mark_head_optimized($result_html);
2416 4182 }
2417 4183
2418 - $result_html = $this->restore_case_sensitive_attributes($result_html);
4184 + $result_html = $this->otto_guard_html($this->restore_case_sensitive_attributes($result_html), $result_html, 'restore_case_sensitive_attributes');
2419 4185
2420 - # WP-355 / WP-315: Re-inject any <style> blocks lost during processing.
2421 - $result_html = $this->restore_lost_style_blocks($result_html, $original_style_blocks);
4186 + # / Re-inject any <style> blocks lost during processing.
4187 + $result_html = $this->otto_guard_html($this->restore_lost_style_blocks($result_html, $original_style_blocks), $result_html, 'restore_lost_style_blocks');
2422 4188
2423 - # WP-315: Fix Divi 5 shortcode framework class renumbering
2424 - $result_html = $this->fix_divi_class_renumbering($result_html);
4189 + # Do NOT renumber Divi classes on the buffer/in-place path.
4190 + # fix_divi_class_renumbering() exists to undo the index offset that
4191 + # Divi's shortcode framework introduces ONLY during the internal
4192 + # wp_remote_get fetch (handle_route_html), where the Theme Builder
4193 + # header is counted twice. process_html_directly() processes the
4194 + # page Divi already rendered normally — its module numbering and
4195 + # Divi's own CSS are already in sync. Renumbering here desynced every
4196 + # section/row/column/text/button index (e.g. et_pb_section_10 → _0),
4197 + # colliding page modules with header/global modules of the same
4198 + # number and collapsing layouts (Divi hero/slider) on Divi sites.
4199 + # The renumber stays only on the HTTP-fetch path (handle_route_html).
2425 4200
2426 - # WP-315: Clean OTTO internal fetch params from HTML output
2427 - $result_html = $this->clean_otto_fetch_params($result_html);
4201 + # Clean OTTO internal fetch params from HTML output
4202 + $result_html = $this->otto_guard_html($this->clean_otto_fetch_params($result_html), $result_html, 'clean_otto_fetch_params');
2428 4203
4204 + # Remove any lazy-video facade <style> hoisted into the page
4205 + # (runs while srcdoc is still tokenized, so the iframe's own copy is safe).
4206 + $result_html = $this->otto_guard_html($this->strip_hoisted_facade_styles($result_html), $result_html, 'strip_hoisted_facade_styles');
4207 +
4208 + # Restore the original encoded srcdoc values (undo tokenization).
4209 + $result_html = $this->otto_guard_html($this->restore_srcdoc_attributes($result_html, $srcdoc_store), $result_html, 'restore_srcdoc_attributes');
4210 +
4211 + # Keep <meta charset> within the first 1024 bytes so external CSS
4212 + # (e.g. checkmark content:"✓") doesn't mojibake on cached responses.
4213 + $result_html = $this->otto_guard_html($this->ensure_early_charset_meta($result_html), $result_html, 'ensure_early_charset_meta');
4214 +
4215 + # undo double-encoded numeric/hex character references produced by the
4216 + # bundled simplehtmldom serializer from attributes like data-x-icon-s="&#xf3c5".
4217 + $result_html = $this->otto_guard_html($this->repair_double_encoded_entities($result_html), $result_html, 'repair_double_encoded_entities');
4218 +
4219 + # restore literal '&' query-string separators the serializer escaped to
4220 + # '&amp;', which silently truncates multi-family Google Fonts URLs.
4221 + $result_html = $this->otto_guard_html($this->repair_query_string_ampersands($result_html), $result_html, 'repair_query_string_ampersands');
4222 +
4223 + # Remove any lazy-video facade <style> hoisted into the page
4224 + # (runs while srcdoc is still tokenized, so the iframe's own copy is safe).
4225 + $result_html = $this->strip_hoisted_facade_styles($result_html);
4226 +
4227 + # Restore the original encoded srcdoc values (undo tokenization).
4228 + $result_html = $this->restore_srcdoc_attributes($result_html, $srcdoc_store);
4229 +
4230 + # Keep <meta charset> within the first 1024 bytes so external CSS
4231 + # (e.g. checkmark content:"✓") doesn't mojibake on cached responses.
4232 + $result_html = $this->ensure_early_charset_meta($result_html);
4233 +
4234 + # undo double-encoded numeric/hex character references produced by the
4235 + # bundled simplehtmldom serializer from attributes like data-x-icon-s="&#xf3c5".
4236 + $result_html = $this->repair_double_encoded_entities($result_html);
4237 +
2429 4238 return $result_html;
2430 4239
2431 4240 } catch (Exception $e) {
2432 - error_log('MetaSync ' . Metasync::get_whitelabel_otto_name() . ': Exception in process_html_directly - ' . $e->getMessage());
4241 + if (function_exists('metasync_otto_report_render_failure')) {
4242 + metasync_otto_report_render_failure(
4243 + 'MODIFICATION_EXCEPTION',
4244 + 'OTTO rewrite threw: ' . $e->getMessage(),
4245 + ['exception' => get_class($e)],
4246 + 'error'
4247 + );
4248 + }
2433 4249 return false;
2434 4250 } catch (Error $e) {
2435 - error_log('MetaSync ' . Metasync::get_whitelabel_otto_name() . ': Error in process_html_directly - ' . $e->getMessage());
4251 + if (function_exists('metasync_otto_report_render_failure')) {
4252 + metasync_otto_report_render_failure(
4253 + 'MODIFICATION_ERROR',
4254 + 'OTTO rewrite errored: ' . $e->getMessage(),
4255 + ['error' => get_class($e)],
4256 + 'error'
4257 + );
4258 + }
2436 4259 return false;
2437 4260 }
2438 4261 }
2439 4262
@@ -2482,29 +4305,21 @@
2482 4305 }
2483 4306 }
2484 4307 }
2485 4308
2486 - if ($remove_title && !$has_custom_title) {
2487 - # Remove Open Graph and Twitter title tags (keep main <title>)
2488 - $title_selectors = [
2489 - 'meta[property=og:title]',
2490 - 'meta[name=twitter:title]',
2491 - ];
4309 + # Preserve third-party og:title/twitter:title tags here. They used to be
4310 + # stripped whenever $remove_title was set, but that also removes them
4311 + # when no custom title exists to replace them, leaving pages with no
4312 + # og:title/twitter:title at all. OTTO's own title/OG dedup and
4313 + # precedence passes already reconcile duplicates, so this branch no
4314 + # longer needs to delete those tags.
2492 4315
2493 - foreach ($title_selectors as $selector) {
2494 - $tags = $this->dom->find($selector);
2495 - foreach ($tags as $tag) {
2496 - $tag->outertext = ''; # Remove the tag
2497 - }
2498 - }
2499 - }
2500 -
2501 4316 # Save changes
2502 4317 $this->save_reload();
2503 4318 }
2504 4319
2505 4320 /**
2506 - * Clean OTTO internal fetch query parameters from rendered HTML (WP-315).
4321 + * Clean OTTO internal fetch query parameters from rendered HTML.
2507 4322 *
2508 4323 * @param string $html The rendered HTML
2509 4324 * @return string HTML with OTTO fetch params removed
2510 4325 */
@@ -2518,9 +4333,9 @@
2518 4333 '/[?&]amp;otto_block_desc=1/',
2519 4334 ];
2520 4335 $html = preg_replace($patterns, '', $html);
2521 4336
2522 - # WP-398: Protect <script>/<style> bodies before the URL cleanup below.
4337 + # Protect <script>/<style> bodies before the URL cleanup below.
2523 4338 # The href/src/action matcher can otherwise match JS that looks like an
2524 4339 # attribute (e.g. location.href="/x??y", el.src="a??b") and collapse the
2525 4340 # ?? inside it. Swap each block for a placeholder comment, run the cleanup,
2526 4341 # then restore byte-for-byte.
@@ -2534,17 +4349,25 @@
2534 4349 },
2535 4350 $html
2536 4351 );
2537 4352
2538 - # WP-398: Normalize leftover query-string separators (?? / ?& / ?#) created
2539 - # by the param removal above — but ONLY inside URL attributes (href/src/action).
2540 - # The previous implementation ran str_replace('??','?') over the ENTIRE document,
2541 - # which corrupted inline JavaScript nullish operators (?? / ??=) and any literal
2542 - # "??" in page text — breaking Slider Revolution and other modern inline scripts.
4353 + # Normalize leftover query-string separators (?& / ?#) created by the param
4354 + # removal above — but ONLY inside URL attributes (href/src/action).
4355 + #
4356 + # IMPORTANT: never collapse "??". It is valid, load-bearing syntax for
4357 + # file-concatenation endpoints — Jetpack Boost (/_jb_static/??<hash>) and
4358 + # WordPress core (load-styles.php??... / load-scripts.php??...). Collapsing
4359 + # "??" -> "?" points those at a different URL that returns HTTP 400 / empty,
4360 + # so every affected CSS/JS bundle fails to load and the page renders broken
4361 + # (Kadence + Jetpack Boost "defer non-essential CSS" was the reported case).
4362 + # Removing an OTTO fetch param never produces a "??" anyway, so there is
4363 + # nothing to normalize there.
4364 + # (A previous implementation ran str_replace('??','?') over the ENTIRE
4365 + # document, which additionally corrupted inline JavaScript nullish operators.)
2543 4366 $html = preg_replace_callback(
2544 4367 '/\b(href|src|action)(\s*=\s*)(["\'])(.*?)\3/is',
2545 4368 function ($m) {
2546 - $url = str_replace(['??', '?&', '?#'], ['?', '?', '#'], $m[4]);
4369 + $url = str_replace(['?&', '?#'], ['?', '#'], $m[4]);
2547 4370 return $m[1] . $m[2] . $m[3] . $url . $m[3];
2548 4371 },
2549 4372 $html
2550 4373 );
@@ -2557,9 +4380,9 @@
2557 4380 return $html;
2558 4381 }
2559 4382
2560 4383 /**
2561 - * Fix Divi 5 shortcode framework class renumbering (WP-315)
4384 + * Fix Divi 5 shortcode framework class renumbering
2562 4385 *
2563 4386 * When Divi 5's shortcode framework loads during the internal HTTP fetch,
2564 4387 * it uses shared counters across all template parts (header + page + footer),
2565 4388 * causing page content element classes to be offset (et_pb_section_0 becomes
@@ -2599,9 +4422,9 @@
2599 4422 # IMPORTANT: 'blog' and 'portfolio' MUST be included — OTTO's HTTP render
2600 4423 # shifts their numbering (et_pb_blog_0 → et_pb_blog_1) because the internal
2601 4424 # wp_remote_get includes the Theme Builder header template in Divi's counter.
2602 4425 # If the blog module class doesn't match between page 1 (OTTO-processed) and
2603 - # page 2 (AJAX, no OTTO), Divi's pagination JS can't find the container → empty results (WP-315).
4426 + # page 2 (AJAX, no OTTO), Divi's pagination JS can't find the container → empty results.
2604 4427 $types = [
2605 4428 'section', 'row', 'column', 'text', 'blurb', 'toggle',
2606 4429 'button', 'image', 'group_carousel',
2607 4430 'blog', 'portfolio', 'filterable_portfolio', 'shop',
@@ -2609,11 +4432,21 @@
2609 4432 ];
2610 4433
2611 4434 $offsets = [];
2612 4435
4436 + # Lookahead excludes two non-instance class shapes so we never rewrite them:
4437 + # _tb_ → Theme Builder index suffix (et_pb_column_0_tb_header)
4438 + # _\d → Divi column WIDTH fractions (et_pb_column_4_4, _1_2, _1_3, …).
4439 + # The width fraction is NOT an instance counter; rewriting it (e.g.
4440 + # et_pb_column_4_4 → et_pb_column_0_4) strips the column's width rule from
4441 + # Divi's static stylesheet (.et_pb_column_4_4{width:100%}) and collapses the
4442 + # layout. Bare instance indices (et_pb_column_16, followed by space/quote)
4443 + # still match and renumber as intended.
4444 + $instance_lookahead = '(?!_(?:tb_|\d))';
4445 +
2613 4446 foreach ($types as $type) {
2614 - # Find the FIRST numbered instance in page content (not _tb_ suffixed)
2615 - if (preg_match('/et_pb_' . preg_quote($type, '/') . '_(\d+)(?!_tb_)/', $page_content, $m)) {
4447 + # Find the FIRST numbered instance in page content (not _tb_ or width-fraction)
4448 + if (preg_match('/et_pb_' . preg_quote($type, '/') . '_(\d+)' . $instance_lookahead . '/', $page_content, $m)) {
2616 4449 $first_num = (int) $m[1];
2617 4450 if ($first_num > 0) {
2618 4451 $offsets[$type] = $first_num;
2619 4452 }
@@ -2627,9 +4460,9 @@
2627 4460 # Remap each element type back to 0-based numbering
2628 4461 foreach ($offsets as $etype => $offset) {
2629 4462 $escaped = preg_quote($etype, '/');
2630 4463 $html = preg_replace_callback(
2631 - '/et_pb_' . $escaped . '_(\d+)(?!_tb_)/',
4464 + '/et_pb_' . $escaped . '_(\d+)' . $instance_lookahead . '/',
2632 4465 function ($m) use ($etype, $offset) {
2633 4466 $num = (int) $m[1];
2634 4467 if ($num >= $offset) {
2635 4468 return 'et_pb_' . $etype . '_' . ($num - $offset);
@@ -2704,5 +4537,5 @@
2704 4537 return $html;
2705 4538 }
2706 4539
2707 4540
2708 -}
4541 +}