| @@ -1,423 +1,423 @@ | ||
| 1 | -<?php | |
| 2 | - | |
| 3 | -// If this file is called directly, abort. | |
| 4 | -if ( ! defined( 'WPINC' ) ) { | |
| 5 | - die; | |
| 6 | -} | |
| 7 | - | |
| 8 | - | |
| 9 | -/** | |
| 10 | - * Add hreflang alternate links to XML sitemap for multilingual support. | |
| 11 | - * | |
| 12 | - * @param string $content The original XML sitemap content. | |
| 13 | - * @return string The modified XML content with added xhtml:link alternate tags. | |
| 14 | - */ | |
| 15 | -function wplng_sitemap_add_hreflang_links( $content ) { | |
| 16 | - | |
| 17 | - // Return the content as is if it's empty or not valid XML. | |
| 18 | - if ( empty( $content ) || ! wplng_str_is_xml( $content ) ) { | |
| 19 | - return $content; | |
| 20 | - } | |
| 21 | - | |
| 22 | - // Get language data. | |
| 23 | - $language_website_id = wplng_get_language_website_id(); | |
| 24 | - $languages_target_ids = wplng_get_languages_target_ids(); | |
| 25 | - | |
| 26 | - if ( empty( $language_website_id ) || empty( $languages_target_ids ) ) { | |
| 27 | - return $content; | |
| 28 | - } | |
| 29 | - | |
| 30 | - // Load the XML content into a DOMDocument. | |
| 31 | - $dom = new DOMDocument( '1.0', 'UTF-8' ); | |
| 32 | - $dom->preserveWhiteSpace = false; | |
| 33 | - $dom->formatOutput = true; | |
| 34 | - | |
| 35 | - // Enable internal error handling | |
| 36 | - $previous_libxml_setting = libxml_use_internal_errors( true ); | |
| 37 | - | |
| 38 | - // Check XML errors | |
| 39 | - if ( ! $dom->loadXML( $content ) ) { | |
| 40 | - if ( defined( 'WPLNG_DEBUG_XML' ) && true === WPLNG_DEBUG_XML ) { | |
| 41 | - $errors = array(); | |
| 42 | - | |
| 43 | - foreach ( libxml_get_errors() as $error ) { | |
| 44 | - $errors[] = $error->message; | |
| 45 | - } | |
| 46 | - | |
| 47 | - libxml_clear_errors(); | |
| 48 | - | |
| 49 | - $debug = array( | |
| 50 | - 'title' => 'wpLingua XML debug - Invalid XML content', | |
| 51 | - 'errors' => $errors, | |
| 52 | - ); | |
| 53 | - | |
| 54 | - error_log( var_export( $debug, true ) ); | |
| 55 | - } | |
| 56 | - | |
| 57 | - return $content; | |
| 58 | - } | |
| 59 | - | |
| 60 | - // Restore previous setting | |
| 61 | - libxml_use_internal_errors( $previous_libxml_setting ); | |
| 62 | - | |
| 63 | - // Replace XSL stylesheet URL if option enabled | |
| 64 | - if ( get_option( 'wplng_sitemap_xsl_override', false ) ) { | |
| 65 | - $wplng_xsl_url = plugins_url( 'assets/sitemap.xsl', __DIR__ ); | |
| 66 | - | |
| 67 | - // Find existing xml-stylesheet processing instruction | |
| 68 | - $xsl_found = false; | |
| 69 | - foreach ( $dom->childNodes as $node ) { | |
| 70 | - if ( $node->nodeType === XML_PI_NODE && $node->target === 'xml-stylesheet' ) { | |
| 71 | - $node->data = 'type="text/xsl" href="' . esc_url( $wplng_xsl_url ) . '"'; | |
| 72 | - $xsl_found = true; | |
| 73 | - break; | |
| 74 | - } | |
| 75 | - } | |
| 76 | - | |
| 77 | - // If no xml-stylesheet found, add one before the root element | |
| 78 | - if ( ! $xsl_found ) { | |
| 79 | - $xsl_pi = $dom->createProcessingInstruction( | |
| 80 | - 'xml-stylesheet', | |
| 81 | - 'type="text/xsl" href="' . esc_url( $wplng_xsl_url ) . '"' | |
| 82 | - ); | |
| 83 | - $dom->insertBefore( $xsl_pi, $dom->documentElement ); | |
| 84 | - } | |
| 85 | - } | |
| 86 | - | |
| 87 | - $signature = '<!-- XML Sitemap is made multilingual by wpLingua -->' . PHP_EOL; | |
| 88 | - | |
| 89 | - // Register namespaces and prepare XPath. | |
| 90 | - $xpath = new DOMXPath( $dom ); | |
| 91 | - $xpath->registerNamespace( 'sm', 'http://www.sitemaps.org/schemas/sitemap/0.9' ); | |
| 92 | - $xpath->registerNamespace( 'xhtml', 'http://www.w3.org/1999/xhtml' ); | |
| 93 | - | |
| 94 | - // Ensure the root element declares the required namespaces. | |
| 95 | - $urlset = $dom->documentElement; | |
| 96 | - if ( ! $urlset->hasAttribute( 'xmlns' ) ) { | |
| 97 | - $urlset->setAttribute( 'xmlns', 'http://www.sitemaps.org/schemas/sitemap/0.9' ); | |
| 98 | - } | |
| 99 | - if ( ! $urlset->hasAttribute( 'xmlns:xhtml' ) ) { | |
| 100 | - $urlset->setAttribute( 'xmlns:xhtml', 'http://www.w3.org/1999/xhtml' ); | |
| 101 | - } | |
| 102 | - | |
| 103 | - // Get all <url> nodes. | |
| 104 | - $url_nodes = $xpath->query( '//sm:url' ); | |
| 105 | - | |
| 106 | - if ( empty( $url_nodes ) ) { | |
| 107 | - return $dom->saveXML() . $signature; | |
| 108 | - } | |
| 109 | - | |
| 110 | - foreach ( $url_nodes as $url_node ) { | |
| 111 | - | |
| 112 | - // Get original URL. | |
| 113 | - $loc_node = $xpath->query( 'sm:loc', $url_node )->item( 0 ); | |
| 114 | - | |
| 115 | - if ( empty( $loc_node ) ) { | |
| 116 | - continue; | |
| 117 | - } | |
| 118 | - | |
| 119 | - $url_original = trim( $loc_node->nodeValue ); | |
| 120 | - | |
| 121 | - if ( '' === $url_original || ! wplng_url_is_translatable( $url_original ) ) { | |
| 122 | - continue; | |
| 123 | - } | |
| 124 | - | |
| 125 | - // Add link for original language. | |
| 126 | - $link_node = $dom->createElement( 'xhtml:link' ); | |
| 127 | - $link_node->setAttribute( 'rel', 'alternate' ); | |
| 128 | - $link_node->setAttribute( 'hreflang', esc_attr( $language_website_id ) ); | |
| 129 | - $link_node->setAttribute( 'href', esc_url( $url_original ) ); | |
| 130 | - $url_node->appendChild( $link_node ); | |
| 131 | - | |
| 132 | - // Add links for target languages. | |
| 133 | - foreach ( $languages_target_ids as $language_id ) { | |
| 134 | - | |
| 135 | - $translated_url = wplng_url_translate( | |
| 136 | - $url_original, | |
| 137 | - $language_id | |
| 138 | - ); | |
| 139 | - | |
| 140 | - // Validate the translated URL. | |
| 141 | - if ( empty( $translated_url ) | |
| 142 | - || ! filter_var( $translated_url, FILTER_VALIDATE_URL ) | |
| 143 | - ) { | |
| 144 | - continue; | |
| 145 | - } | |
| 146 | - | |
| 147 | - $link_node = $dom->createElement( 'xhtml:link' ); | |
| 148 | - $link_node->setAttribute( 'rel', 'alternate' ); | |
| 149 | - $link_node->setAttribute( 'hreflang', esc_attr( $language_id ) ); | |
| 150 | - $link_node->setAttribute( 'href', esc_url( $translated_url ) ); | |
| 151 | - $url_node->appendChild( $link_node ); | |
| 152 | - } | |
| 153 | - } | |
| 154 | - | |
| 155 | - $sitemap = $dom->saveXML(); | |
| 156 | - | |
| 157 | - if ( empty( $sitemap ) ) { | |
| 158 | - return $content; | |
| 159 | - } | |
| 160 | - | |
| 161 | - return $sitemap . $signature; | |
| 162 | -} | |
| 163 | - | |
| 164 | - | |
| 165 | -/** | |
| 166 | - * Modify XSL stylesheet to display translated links in sitemap. | |
| 167 | - * | |
| 168 | - * @param string $content The original XSL content. | |
| 169 | - * @return string The modified XSL content with translations displayed under each URL. | |
| 170 | - */ | |
| 171 | -function wplng_sitemap_modify_xsl( $content ) { | |
| 172 | - | |
| 173 | - if ( empty( $content ) ) { | |
| 174 | - return $content; | |
| 175 | - } | |
| 176 | - | |
| 177 | - // Check if this XSL already has translations support | |
| 178 | - if ( strpos( $content, 'wplng-translations' ) !== false ) { | |
| 179 | - return $content; | |
| 180 | - } | |
| 181 | - | |
| 182 | - // Load XSL into DOMDocument | |
| 183 | - $dom = new DOMDocument( '1.0', 'UTF-8' ); | |
| 184 | - $dom->preserveWhiteSpace = false; | |
| 185 | - $dom->formatOutput = true; | |
| 186 | - | |
| 187 | - // Enable internal error handling | |
| 188 | - $previous_libxml_setting = libxml_use_internal_errors( true ); | |
| 189 | - | |
| 190 | - if ( ! $dom->loadXML( $content ) ) { | |
| 191 | - libxml_clear_errors(); | |
| 192 | - libxml_use_internal_errors( $previous_libxml_setting ); | |
| 193 | - return $content; | |
| 194 | - } | |
| 195 | - | |
| 196 | - libxml_use_internal_errors( $previous_libxml_setting ); | |
| 197 | - | |
| 198 | - $xpath = new DOMXPath( $dom ); | |
| 199 | - $xpath->registerNamespace( 'xsl', 'http://www.w3.org/1999/XSL/Transform' ); | |
| 200 | - | |
| 201 | - // Add xhtml namespace to xsl:stylesheet if not present | |
| 202 | - $stylesheet = $dom->documentElement; | |
| 203 | - if ( ! $stylesheet->hasAttribute( 'xmlns:xhtml' ) ) { | |
| 204 | - $stylesheet->setAttribute( 'xmlns:xhtml', 'http://www.w3.org/1999/xhtml' ); | |
| 205 | - } | |
| 206 | - | |
| 207 | - // Add CSS to existing <style> element or create one in <head> | |
| 208 | - $css = ' | |
| 209 | - .wplng-translations { margin-top: 8px; padding-top: 8px; border-top: 1px dashed #ddd; } | |
| 210 | - .wplng-translation-row { display: block; margin: 4px 0; font-size: 13px; } | |
| 211 | - .wplng-lang-badge { display: inline-block; min-width: 24px; padding: 2px 6px; margin-right: 8px; background: #0073aa; color: white; border-radius: 3px; font-size: 11px; text-align: center; font-weight: bold; } | |
| 212 | - .wplng-translation-row a { color: #0073aa; text-decoration: none; } | |
| 213 | - .wplng-translation-row a:hover { text-decoration: underline; } | |
| 214 | - .wplng-credit { margin-top: 20px; padding: 10px; background: #f5f5f5; border-radius: 4px; font-size: 12px; color: #666; text-align: center; } | |
| 215 | - .wplng-credit a { color: #0073aa; } | |
| 216 | - '; | |
| 217 | - | |
| 218 | - $style_nodes = $xpath->query( '//style' ); | |
| 219 | - if ( $style_nodes->length > 0 ) { | |
| 220 | - $style_node = $style_nodes->item( 0 ); | |
| 221 | - $style_node->nodeValue .= $css; | |
| 222 | - } else { | |
| 223 | - $head_nodes = $xpath->query( '//head' ); | |
| 224 | - if ( $head_nodes->length > 0 ) { | |
| 225 | - $style_element = $dom->createElement( 'style', $css ); | |
| 226 | - $head_nodes->item( 0 )->appendChild( $style_element ); | |
| 227 | - } | |
| 228 | - } | |
| 229 | - | |
| 230 | - // Create the XSL fragment for translations | |
| 231 | - $xsl_ns = 'http://www.w3.org/1999/XSL/Transform'; | |
| 232 | - | |
| 233 | - // Find the <td> containing the URL (class="loc" or containing sitemap:loc) | |
| 234 | - $loc_cells = $xpath->query( '//td[contains(@class, "loc")]' ); | |
| 235 | - | |
| 236 | - if ( $loc_cells->length > 0 ) { | |
| 237 | - $loc_cell = $loc_cells->item( 0 ); | |
| 238 | - | |
| 239 | - // Create xsl:if element | |
| 240 | - $xsl_if = $dom->createElementNS( $xsl_ns, 'xsl:if' ); | |
| 241 | - $xsl_if->setAttribute( 'test', "xhtml:link[@rel='alternate']" ); | |
| 242 | - | |
| 243 | - // Create wrapper div | |
| 244 | - $div = $dom->createElement( 'div' ); | |
| 245 | - $div->setAttribute( 'class', 'wplng-translations' ); | |
| 246 | - | |
| 247 | - // Create xsl:for-each element | |
| 248 | - $xsl_foreach = $dom->createElementNS( $xsl_ns, 'xsl:for-each' ); | |
| 249 | - $xsl_foreach->setAttribute( 'select', "xhtml:link[@rel='alternate']" ); | |
| 250 | - | |
| 251 | - // Create span.wplng-translation-row | |
| 252 | - $span_row = $dom->createElement( 'span' ); | |
| 253 | - $span_row->setAttribute( 'class', 'wplng-translation-row' ); | |
| 254 | - | |
| 255 | - // Create span.wplng-lang-badge with xsl:value-of | |
| 256 | - $span_badge = $dom->createElement( 'span' ); | |
| 257 | - $span_badge->setAttribute( 'class', 'wplng-lang-badge' ); | |
| 258 | - $xsl_value_lang = $dom->createElementNS( $xsl_ns, 'xsl:value-of' ); | |
| 259 | - $xsl_value_lang->setAttribute( 'select', '@hreflang' ); | |
| 260 | - $span_badge->appendChild( $xsl_value_lang ); | |
| 261 | - | |
| 262 | - // Create anchor element | |
| 263 | - $anchor = $dom->createElement( 'a' ); | |
| 264 | - $anchor->setAttribute( 'href', '{@href}' ); | |
| 265 | - $xsl_value_href = $dom->createElementNS( $xsl_ns, 'xsl:value-of' ); | |
| 266 | - $xsl_value_href->setAttribute( 'select', '@href' ); | |
| 267 | - $anchor->appendChild( $xsl_value_href ); | |
| 268 | - | |
| 269 | - // Assemble the structure | |
| 270 | - $span_row->appendChild( $span_badge ); | |
| 271 | - $span_row->appendChild( $anchor ); | |
| 272 | - $xsl_foreach->appendChild( $span_row ); | |
| 273 | - $div->appendChild( $xsl_foreach ); | |
| 274 | - $xsl_if->appendChild( $div ); | |
| 275 | - | |
| 276 | - // Append to loc cell | |
| 277 | - $loc_cell->appendChild( $xsl_if ); | |
| 278 | - } | |
| 279 | - | |
| 280 | - // Add credit message to the page footer | |
| 281 | - $body_nodes = $xpath->query( '//body' ); | |
| 282 | - if ( $body_nodes->length > 0 ) { | |
| 283 | - $body = $body_nodes->item( 0 ); | |
| 284 | - | |
| 285 | - // Find the main container div or append to body | |
| 286 | - $container_nodes = $xpath->query( '//div[@id="sitemap"] | //div[@id="content"] | //div[contains(@class, "sitemap")]' ); | |
| 287 | - $target = ( $container_nodes->length > 0 ) ? $container_nodes->item( 0 ) : $body; | |
| 288 | - | |
| 289 | - $credit_div = $dom->createElement( 'p' ); | |
| 290 | - $credit_div->setAttribute( 'class', 'wplng-credit' ); | |
| 291 | - | |
| 292 | - $credit_text = $dom->createTextNode( 'Multilingual sitemap powered by ' ); | |
| 293 | - $credit_div->appendChild( $credit_text ); | |
| 294 | - | |
| 295 | - $credit_link = $dom->createElement( 'a', 'wpLingua' ); | |
| 296 | - $credit_link->setAttribute( 'href', 'https://wplingua.com' ); | |
| 297 | - $credit_link->setAttribute( 'target', '_blank' ); | |
| 298 | - $credit_link->setAttribute( 'rel', 'noopener' ); | |
| 299 | - $credit_div->appendChild( $credit_link ); | |
| 300 | - | |
| 301 | - $target->appendChild( $credit_div ); | |
| 302 | - } | |
| 303 | - | |
| 304 | - $result = $dom->saveXML(); | |
| 305 | - | |
| 306 | - if ( empty( $result ) ) { | |
| 307 | - return $content; | |
| 308 | - } | |
| 309 | - | |
| 310 | - // Add XML comment at the end | |
| 311 | - $result .= PHP_EOL . '<!-- XSL Sitemap stylesheet is made multilingual by wpLingua -->'; | |
| 312 | - | |
| 313 | - return $result; | |
| 314 | -} | |
| 315 | - | |
| 316 | - | |
| 317 | -/** | |
| 318 | - * Filter All In One SEO sitemap post entries to add multilingual alternate URLs. | |
| 319 | - * | |
| 320 | - * @param array $entry The sitemap entry data. | |
| 321 | - * @param int $post_id The post ID. | |
| 322 | - * @return array The modified sitemap entry with language alternatives. | |
| 323 | - */ | |
| 324 | -function wplng_aioseo_filter_sitemap_post( $entry, $post_id ) { | |
| 325 | - | |
| 326 | - // Get the post URL | |
| 327 | - $post_url = get_permalink( $post_id ); | |
| 328 | - | |
| 329 | - if ( empty( $post_url ) || ! wplng_url_is_translatable( $post_url ) ) { | |
| 330 | - return $entry; | |
| 331 | - } | |
| 332 | - | |
| 333 | - // Get language data | |
| 334 | - $language_website_id = wplng_get_language_website_id(); | |
| 335 | - $languages_target_ids = wplng_get_languages_target_ids(); | |
| 336 | - | |
| 337 | - if ( empty( $language_website_id ) || empty( $languages_target_ids ) ) { | |
| 338 | - return $entry; | |
| 339 | - } | |
| 340 | - | |
| 341 | - // Set the main language | |
| 342 | - $entry['language'] = $language_website_id; | |
| 343 | - | |
| 344 | - // Add translated versions (including original language for self-reference) | |
| 345 | - $entry['languages'] = array(); | |
| 346 | - | |
| 347 | - // Add original language (self-referencing hreflang) | |
| 348 | - $entry['languages'][] = array( | |
| 349 | - 'language' => $language_website_id, | |
| 350 | - 'location' => $post_url, | |
| 351 | - ); | |
| 352 | - | |
| 353 | - foreach ( $languages_target_ids as $language_id ) { | |
| 354 | - $translated_url = wplng_url_translate( $post_url, $language_id ); | |
| 355 | - | |
| 356 | - if ( ! empty( $translated_url ) && filter_var( $translated_url, FILTER_VALIDATE_URL ) ) { | |
| 357 | - $entry['languages'][] = array( | |
| 358 | - 'language' => $language_id, | |
| 359 | - 'location' => $translated_url, | |
| 360 | - ); | |
| 361 | - } | |
| 362 | - } | |
| 363 | - | |
| 364 | - return $entry; | |
| 365 | -} | |
| 366 | - | |
| 367 | - | |
| 368 | -/** | |
| 369 | - * Filter All In One SEO sitemap term entries to add multilingual alternate URLs. | |
| 370 | - * | |
| 371 | - * @param array $entry The sitemap entry data. | |
| 372 | - * @param int $term_id The term ID. | |
| 373 | - * @return array The modified sitemap entry with language alternatives. | |
| 374 | - */ | |
| 375 | -function wplng_aioseo_filter_sitemap_term( $entry, $term_id ) { | |
| 376 | - | |
| 377 | - // Get the term object | |
| 378 | - $term = get_term( $term_id ); | |
| 379 | - | |
| 380 | - if ( is_wp_error( $term ) || empty( $term ) ) { | |
| 381 | - return $entry; | |
| 382 | - } | |
| 383 | - | |
| 384 | - // Get the term URL | |
| 385 | - $term_url = get_term_link( $term ); | |
| 386 | - | |
| 387 | - if ( is_wp_error( $term_url ) || empty( $term_url ) || ! wplng_url_is_translatable( $term_url ) ) { | |
| 388 | - return $entry; | |
| 389 | - } | |
| 390 | - | |
| 391 | - // Get language data | |
| 392 | - $language_website_id = wplng_get_language_website_id(); | |
| 393 | - $languages_target_ids = wplng_get_languages_target_ids(); | |
| 394 | - | |
| 395 | - if ( empty( $language_website_id ) || empty( $languages_target_ids ) ) { | |
| 396 | - return $entry; | |
| 397 | - } | |
| 398 | - | |
| 399 | - // Set the main language | |
| 400 | - $entry['language'] = $language_website_id; | |
| 401 | - | |
| 402 | - // Add translated versions (including original language for self-reference) | |
| 403 | - $entry['languages'] = array(); | |
| 404 | - | |
| 405 | - // Add original language (self-referencing hreflang) | |
| 406 | - $entry['languages'][] = array( | |
| 407 | - 'language' => $language_website_id, | |
| 408 | - 'location' => $term_url, | |
| 409 | - ); | |
| 410 | - | |
| 411 | - foreach ( $languages_target_ids as $language_id ) { | |
| 412 | - $translated_url = wplng_url_translate( $term_url, $language_id ); | |
| 413 | - | |
| 414 | - if ( ! empty( $translated_url ) && filter_var( $translated_url, FILTER_VALIDATE_URL ) ) { | |
| 415 | - $entry['languages'][] = array( | |
| 416 | - 'language' => $language_id, | |
| 417 | - 'location' => $translated_url, | |
| 418 | - ); | |
| 419 | - } | |
| 420 | - } | |
| 421 | - | |
| 422 | - return $entry; | |
| 423 | -} | |
| 1 | +<?php | |
| 2 | + | |
| 3 | +// If this file is called directly, abort. | |
| 4 | +if ( ! defined( 'WPINC' ) ) { | |
| 5 | + die; | |
| 6 | +} | |
| 7 | + | |
| 8 | + | |
| 9 | +/** | |
| 10 | + * Add hreflang alternate links to XML sitemap for multilingual support. | |
| 11 | + * | |
| 12 | + * @param string $content The original XML sitemap content. | |
| 13 | + * @return string The modified XML content with added xhtml:link alternate tags. | |
| 14 | + */ | |
| 15 | +function wplng_sitemap_add_hreflang_links( $content ) { | |
| 16 | + | |
| 17 | + // Return the content as is if it's empty or not valid XML. | |
| 18 | + if ( empty( $content ) || ! wplng_str_is_xml( $content ) ) { | |
| 19 | + return $content; | |
| 20 | + } | |
| 21 | + | |
| 22 | + // Get language data. | |
| 23 | + $language_website_id = wplng_get_language_website_id(); | |
| 24 | + $languages_target_ids = wplng_get_languages_target_ids(); | |
| 25 | + | |
| 26 | + if ( empty( $language_website_id ) || empty( $languages_target_ids ) ) { | |
| 27 | + return $content; | |
| 28 | + } | |
| 29 | + | |
| 30 | + // Load the XML content into a DOMDocument. | |
| 31 | + $dom = new DOMDocument( '1.0', 'UTF-8' ); | |
| 32 | + $dom->preserveWhiteSpace = false; | |
| 33 | + $dom->formatOutput = true; | |
| 34 | + | |
| 35 | + // Enable internal error handling | |
| 36 | + $previous_libxml_setting = libxml_use_internal_errors( true ); | |
| 37 | + | |
| 38 | + // Check XML errors | |
| 39 | + if ( ! $dom->loadXML( $content ) ) { | |
| 40 | + if ( defined( 'WPLNG_DEBUG_XML' ) && true === WPLNG_DEBUG_XML ) { | |
| 41 | + $errors = array(); | |
| 42 | + | |
| 43 | + foreach ( libxml_get_errors() as $error ) { | |
| 44 | + $errors[] = $error->message; | |
| 45 | + } | |
| 46 | + | |
| 47 | + libxml_clear_errors(); | |
| 48 | + | |
| 49 | + $debug = array( | |
| 50 | + 'title' => 'wpLingua XML debug - Invalid XML content', | |
| 51 | + 'errors' => $errors, | |
| 52 | + ); | |
| 53 | + | |
| 54 | + error_log( var_export( $debug, true ) ); | |
| 55 | + } | |
| 56 | + | |
| 57 | + return $content; | |
| 58 | + } | |
| 59 | + | |
| 60 | + // Restore previous setting | |
| 61 | + libxml_use_internal_errors( $previous_libxml_setting ); | |
| 62 | + | |
| 63 | + // Replace XSL stylesheet URL if option enabled | |
| 64 | + if ( get_option( 'wplng_sitemap_xsl_override', false ) ) { | |
| 65 | + $wplng_xsl_url = plugins_url( 'assets/sitemap.xsl', __DIR__ ); | |
| 66 | + | |
| 67 | + // Find existing xml-stylesheet processing instruction | |
| 68 | + $xsl_found = false; | |
| 69 | + foreach ( $dom->childNodes as $node ) { | |
| 70 | + if ( $node->nodeType === XML_PI_NODE && $node->target === 'xml-stylesheet' ) { | |
| 71 | + $node->data = 'type="text/xsl" href="' . esc_url( $wplng_xsl_url ) . '"'; | |
| 72 | + $xsl_found = true; | |
| 73 | + break; | |
| 74 | + } | |
| 75 | + } | |
| 76 | + | |
| 77 | + // If no xml-stylesheet found, add one before the root element | |
| 78 | + if ( ! $xsl_found ) { | |
| 79 | + $xsl_pi = $dom->createProcessingInstruction( | |
| 80 | + 'xml-stylesheet', | |
| 81 | + 'type="text/xsl" href="' . esc_url( $wplng_xsl_url ) . '"' | |
| 82 | + ); | |
| 83 | + $dom->insertBefore( $xsl_pi, $dom->documentElement ); | |
| 84 | + } | |
| 85 | + } | |
| 86 | + | |
| 87 | + $signature = '<!-- XML Sitemap is made multilingual by wpLingua -->' . PHP_EOL; | |
| 88 | + | |
| 89 | + // Register namespaces and prepare XPath. | |
| 90 | + $xpath = new DOMXPath( $dom ); | |
| 91 | + $xpath->registerNamespace( 'sm', 'http://www.sitemaps.org/schemas/sitemap/0.9' ); | |
| 92 | + $xpath->registerNamespace( 'xhtml', 'http://www.w3.org/1999/xhtml' ); | |
| 93 | + | |
| 94 | + // Ensure the root element declares the required namespaces. | |
| 95 | + $urlset = $dom->documentElement; | |
| 96 | + if ( ! $urlset->hasAttribute( 'xmlns' ) ) { | |
| 97 | + $urlset->setAttribute( 'xmlns', 'http://www.sitemaps.org/schemas/sitemap/0.9' ); | |
| 98 | + } | |
| 99 | + if ( ! $urlset->hasAttribute( 'xmlns:xhtml' ) ) { | |
| 100 | + $urlset->setAttribute( 'xmlns:xhtml', 'http://www.w3.org/1999/xhtml' ); | |
| 101 | + } | |
| 102 | + | |
| 103 | + // Get all <url> nodes. | |
| 104 | + $url_nodes = $xpath->query( '//sm:url' ); | |
| 105 | + | |
| 106 | + if ( empty( $url_nodes ) ) { | |
| 107 | + return $dom->saveXML() . $signature; | |
| 108 | + } | |
| 109 | + | |
| 110 | + foreach ( $url_nodes as $url_node ) { | |
| 111 | + | |
| 112 | + // Get original URL. | |
| 113 | + $loc_node = $xpath->query( 'sm:loc', $url_node )->item( 0 ); | |
| 114 | + | |
| 115 | + if ( empty( $loc_node ) ) { | |
| 116 | + continue; | |
| 117 | + } | |
| 118 | + | |
| 119 | + $url_original = trim( $loc_node->nodeValue ); | |
| 120 | + | |
| 121 | + if ( '' === $url_original || ! wplng_url_is_translatable( $url_original ) ) { | |
| 122 | + continue; | |
| 123 | + } | |
| 124 | + | |
| 125 | + // Add link for original language. | |
| 126 | + $link_node = $dom->createElement( 'xhtml:link' ); | |
| 127 | + $link_node->setAttribute( 'rel', 'alternate' ); | |
| 128 | + $link_node->setAttribute( 'hreflang', esc_attr( $language_website_id ) ); | |
| 129 | + $link_node->setAttribute( 'href', esc_url( $url_original ) ); | |
| 130 | + $url_node->appendChild( $link_node ); | |
| 131 | + | |
| 132 | + // Add links for target languages. | |
| 133 | + foreach ( $languages_target_ids as $language_id ) { | |
| 134 | + | |
| 135 | + $translated_url = wplng_url_translate( | |
| 136 | + $url_original, | |
| 137 | + $language_id | |
| 138 | + ); | |
| 139 | + | |
| 140 | + // Validate the translated URL. | |
| 141 | + if ( empty( $translated_url ) | |
| 142 | + || ! filter_var( $translated_url, FILTER_VALIDATE_URL ) | |
| 143 | + ) { | |
| 144 | + continue; | |
| 145 | + } | |
| 146 | + | |
| 147 | + $link_node = $dom->createElement( 'xhtml:link' ); | |
| 148 | + $link_node->setAttribute( 'rel', 'alternate' ); | |
| 149 | + $link_node->setAttribute( 'hreflang', esc_attr( $language_id ) ); | |
| 150 | + $link_node->setAttribute( 'href', esc_url( $translated_url ) ); | |
| 151 | + $url_node->appendChild( $link_node ); | |
| 152 | + } | |
| 153 | + } | |
| 154 | + | |
| 155 | + $sitemap = $dom->saveXML(); | |
| 156 | + | |
| 157 | + if ( empty( $sitemap ) ) { | |
| 158 | + return $content; | |
| 159 | + } | |
| 160 | + | |
| 161 | + return $sitemap . $signature; | |
| 162 | +} | |
| 163 | + | |
| 164 | + | |
| 165 | +/** | |
| 166 | + * Modify XSL stylesheet to display translated links in sitemap. | |
| 167 | + * | |
| 168 | + * @param string $content The original XSL content. | |
| 169 | + * @return string The modified XSL content with translations displayed under each URL. | |
| 170 | + */ | |
| 171 | +function wplng_sitemap_modify_xsl( $content ) { | |
| 172 | + | |
| 173 | + if ( empty( $content ) ) { | |
| 174 | + return $content; | |
| 175 | + } | |
| 176 | + | |
| 177 | + // Check if this XSL already has translations support | |
| 178 | + if ( wplng_str_contains( $content, 'wplng-translations' ) ) { | |
| 179 | + return $content; | |
| 180 | + } | |
| 181 | + | |
| 182 | + // Load XSL into DOMDocument | |
| 183 | + $dom = new DOMDocument( '1.0', 'UTF-8' ); | |
| 184 | + $dom->preserveWhiteSpace = false; | |
| 185 | + $dom->formatOutput = true; | |
| 186 | + | |
| 187 | + // Enable internal error handling | |
| 188 | + $previous_libxml_setting = libxml_use_internal_errors( true ); | |
| 189 | + | |
| 190 | + if ( ! $dom->loadXML( $content ) ) { | |
| 191 | + libxml_clear_errors(); | |
| 192 | + libxml_use_internal_errors( $previous_libxml_setting ); | |
| 193 | + return $content; | |
| 194 | + } | |
| 195 | + | |
| 196 | + libxml_use_internal_errors( $previous_libxml_setting ); | |
| 197 | + | |
| 198 | + $xpath = new DOMXPath( $dom ); | |
| 199 | + $xpath->registerNamespace( 'xsl', 'http://www.w3.org/1999/XSL/Transform' ); | |
| 200 | + | |
| 201 | + // Add xhtml namespace to xsl:stylesheet if not present | |
| 202 | + $stylesheet = $dom->documentElement; | |
| 203 | + if ( ! $stylesheet->hasAttribute( 'xmlns:xhtml' ) ) { | |
| 204 | + $stylesheet->setAttribute( 'xmlns:xhtml', 'http://www.w3.org/1999/xhtml' ); | |
| 205 | + } | |
| 206 | + | |
| 207 | + // Add CSS to existing <style> element or create one in <head> | |
| 208 | + $css = ' | |
| 209 | + .wplng-translations { margin-top: 8px; padding-top: 8px; border-top: 1px dashed #ddd; } | |
| 210 | + .wplng-translation-row { display: block; margin: 4px 0; font-size: 13px; } | |
| 211 | + .wplng-lang-badge { display: inline-block; min-width: 24px; padding: 2px 6px; margin-right: 8px; background: #0073aa; color: white; border-radius: 3px; font-size: 11px; text-align: center; font-weight: bold; } | |
| 212 | + .wplng-translation-row a { color: #0073aa; text-decoration: none; } | |
| 213 | + .wplng-translation-row a:hover { text-decoration: underline; } | |
| 214 | + .wplng-credit { margin-top: 20px; padding: 10px; background: #f5f5f5; border-radius: 4px; font-size: 12px; color: #666; text-align: center; } | |
| 215 | + .wplng-credit a { color: #0073aa; } | |
| 216 | + '; | |
| 217 | + | |
| 218 | + $style_nodes = $xpath->query( '//style' ); | |
| 219 | + if ( $style_nodes->length > 0 ) { | |
| 220 | + $style_node = $style_nodes->item( 0 ); | |
| 221 | + $style_node->nodeValue .= $css; | |
| 222 | + } else { | |
| 223 | + $head_nodes = $xpath->query( '//head' ); | |
| 224 | + if ( $head_nodes->length > 0 ) { | |
| 225 | + $style_element = $dom->createElement( 'style', $css ); | |
| 226 | + $head_nodes->item( 0 )->appendChild( $style_element ); | |
| 227 | + } | |
| 228 | + } | |
| 229 | + | |
| 230 | + // Create the XSL fragment for translations | |
| 231 | + $xsl_ns = 'http://www.w3.org/1999/XSL/Transform'; | |
| 232 | + | |
| 233 | + // Find the <td> containing the URL (class="loc" or containing sitemap:loc) | |
| 234 | + $loc_cells = $xpath->query( '//td[contains(@class, "loc")]' ); | |
| 235 | + | |
| 236 | + if ( $loc_cells->length > 0 ) { | |
| 237 | + $loc_cell = $loc_cells->item( 0 ); | |
| 238 | + | |
| 239 | + // Create xsl:if element | |
| 240 | + $xsl_if = $dom->createElementNS( $xsl_ns, 'xsl:if' ); | |
| 241 | + $xsl_if->setAttribute( 'test', "xhtml:link[@rel='alternate']" ); | |
| 242 | + | |
| 243 | + // Create wrapper div | |
| 244 | + $div = $dom->createElement( 'div' ); | |
| 245 | + $div->setAttribute( 'class', 'wplng-translations' ); | |
| 246 | + | |
| 247 | + // Create xsl:for-each element | |
| 248 | + $xsl_foreach = $dom->createElementNS( $xsl_ns, 'xsl:for-each' ); | |
| 249 | + $xsl_foreach->setAttribute( 'select', "xhtml:link[@rel='alternate']" ); | |
| 250 | + | |
| 251 | + // Create span.wplng-translation-row | |
| 252 | + $span_row = $dom->createElement( 'span' ); | |
| 253 | + $span_row->setAttribute( 'class', 'wplng-translation-row' ); | |
| 254 | + | |
| 255 | + // Create span.wplng-lang-badge with xsl:value-of | |
| 256 | + $span_badge = $dom->createElement( 'span' ); | |
| 257 | + $span_badge->setAttribute( 'class', 'wplng-lang-badge' ); | |
| 258 | + $xsl_value_lang = $dom->createElementNS( $xsl_ns, 'xsl:value-of' ); | |
| 259 | + $xsl_value_lang->setAttribute( 'select', '@hreflang' ); | |
| 260 | + $span_badge->appendChild( $xsl_value_lang ); | |
| 261 | + | |
| 262 | + // Create anchor element | |
| 263 | + $anchor = $dom->createElement( 'a' ); | |
| 264 | + $anchor->setAttribute( 'href', '{@href}' ); | |
| 265 | + $xsl_value_href = $dom->createElementNS( $xsl_ns, 'xsl:value-of' ); | |
| 266 | + $xsl_value_href->setAttribute( 'select', '@href' ); | |
| 267 | + $anchor->appendChild( $xsl_value_href ); | |
| 268 | + | |
| 269 | + // Assemble the structure | |
| 270 | + $span_row->appendChild( $span_badge ); | |
| 271 | + $span_row->appendChild( $anchor ); | |
| 272 | + $xsl_foreach->appendChild( $span_row ); | |
| 273 | + $div->appendChild( $xsl_foreach ); | |
| 274 | + $xsl_if->appendChild( $div ); | |
| 275 | + | |
| 276 | + // Append to loc cell | |
| 277 | + $loc_cell->appendChild( $xsl_if ); | |
| 278 | + } | |
| 279 | + | |
| 280 | + // Add credit message to the page footer | |
| 281 | + $body_nodes = $xpath->query( '//body' ); | |
| 282 | + if ( $body_nodes->length > 0 ) { | |
| 283 | + $body = $body_nodes->item( 0 ); | |
| 284 | + | |
| 285 | + // Find the main container div or append to body | |
| 286 | + $container_nodes = $xpath->query( '//div[@id="sitemap"] | //div[@id="content"] | //div[contains(@class, "sitemap")]' ); | |
| 287 | + $target = ( $container_nodes->length > 0 ) ? $container_nodes->item( 0 ) : $body; | |
| 288 | + | |
| 289 | + $credit_div = $dom->createElement( 'p' ); | |
| 290 | + $credit_div->setAttribute( 'class', 'wplng-credit' ); | |
| 291 | + | |
| 292 | + $credit_text = $dom->createTextNode( 'Multilingual sitemap powered by ' ); | |
| 293 | + $credit_div->appendChild( $credit_text ); | |
| 294 | + | |
| 295 | + $credit_link = $dom->createElement( 'a', 'wpLingua' ); | |
| 296 | + $credit_link->setAttribute( 'href', 'https://wplingua.com' ); | |
| 297 | + $credit_link->setAttribute( 'target', '_blank' ); | |
| 298 | + $credit_link->setAttribute( 'rel', 'noopener' ); | |
| 299 | + $credit_div->appendChild( $credit_link ); | |
| 300 | + | |
| 301 | + $target->appendChild( $credit_div ); | |
| 302 | + } | |
| 303 | + | |
| 304 | + $result = $dom->saveXML(); | |
| 305 | + | |
| 306 | + if ( empty( $result ) ) { | |
| 307 | + return $content; | |
| 308 | + } | |
| 309 | + | |
| 310 | + // Add XML comment at the end | |
| 311 | + $result .= PHP_EOL . '<!-- XSL Sitemap stylesheet is made multilingual by wpLingua -->'; | |
| 312 | + | |
| 313 | + return $result; | |
| 314 | +} | |
| 315 | + | |
| 316 | + | |
| 317 | +/** | |
| 318 | + * Filter All In One SEO sitemap post entries to add multilingual alternate URLs. | |
| 319 | + * | |
| 320 | + * @param array $entry The sitemap entry data. | |
| 321 | + * @param int $post_id The post ID. | |
| 322 | + * @return array The modified sitemap entry with language alternatives. | |
| 323 | + */ | |
| 324 | +function wplng_aioseo_filter_sitemap_post( $entry, $post_id ) { | |
| 325 | + | |
| 326 | + // Get the post URL | |
| 327 | + $post_url = get_permalink( $post_id ); | |
| 328 | + | |
| 329 | + if ( empty( $post_url ) || ! wplng_url_is_translatable( $post_url ) ) { | |
| 330 | + return $entry; | |
| 331 | + } | |
| 332 | + | |
| 333 | + // Get language data | |
| 334 | + $language_website_id = wplng_get_language_website_id(); | |
| 335 | + $languages_target_ids = wplng_get_languages_target_ids(); | |
| 336 | + | |
| 337 | + if ( empty( $language_website_id ) || empty( $languages_target_ids ) ) { | |
| 338 | + return $entry; | |
| 339 | + } | |
| 340 | + | |
| 341 | + // Set the main language | |
| 342 | + $entry['language'] = $language_website_id; | |
| 343 | + | |
| 344 | + // Add translated versions (including original language for self-reference) | |
| 345 | + $entry['languages'] = array(); | |
| 346 | + | |
| 347 | + // Add original language (self-referencing hreflang) | |
| 348 | + $entry['languages'][] = array( | |
| 349 | + 'language' => $language_website_id, | |
| 350 | + 'location' => $post_url, | |
| 351 | + ); | |
| 352 | + | |
| 353 | + foreach ( $languages_target_ids as $language_id ) { | |
| 354 | + $translated_url = wplng_url_translate( $post_url, $language_id ); | |
| 355 | + | |
| 356 | + if ( ! empty( $translated_url ) && filter_var( $translated_url, FILTER_VALIDATE_URL ) ) { | |
| 357 | + $entry['languages'][] = array( | |
| 358 | + 'language' => $language_id, | |
| 359 | + 'location' => $translated_url, | |
| 360 | + ); | |
| 361 | + } | |
| 362 | + } | |
| 363 | + | |
| 364 | + return $entry; | |
| 365 | +} | |
| 366 | + | |
| 367 | + | |
| 368 | +/** | |
| 369 | + * Filter All In One SEO sitemap term entries to add multilingual alternate URLs. | |
| 370 | + * | |
| 371 | + * @param array $entry The sitemap entry data. | |
| 372 | + * @param int $term_id The term ID. | |
| 373 | + * @return array The modified sitemap entry with language alternatives. | |
| 374 | + */ | |
| 375 | +function wplng_aioseo_filter_sitemap_term( $entry, $term_id ) { | |
| 376 | + | |
| 377 | + // Get the term object | |
| 378 | + $term = get_term( $term_id ); | |
| 379 | + | |
| 380 | + if ( is_wp_error( $term ) || empty( $term ) ) { | |
| 381 | + return $entry; | |
| 382 | + } | |
| 383 | + | |
| 384 | + // Get the term URL | |
| 385 | + $term_url = get_term_link( $term ); | |
| 386 | + | |
| 387 | + if ( is_wp_error( $term_url ) || empty( $term_url ) || ! wplng_url_is_translatable( $term_url ) ) { | |
| 388 | + return $entry; | |
| 389 | + } | |
| 390 | + | |
| 391 | + // Get language data | |
| 392 | + $language_website_id = wplng_get_language_website_id(); | |
| 393 | + $languages_target_ids = wplng_get_languages_target_ids(); | |
| 394 | + | |
| 395 | + if ( empty( $language_website_id ) || empty( $languages_target_ids ) ) { | |
| 396 | + return $entry; | |
| 397 | + } | |
| 398 | + | |
| 399 | + // Set the main language | |
| 400 | + $entry['language'] = $language_website_id; | |
| 401 | + | |
| 402 | + // Add translated versions (including original language for self-reference) | |
| 403 | + $entry['languages'] = array(); | |
| 404 | + | |
| 405 | + // Add original language (self-referencing hreflang) | |
| 406 | + $entry['languages'][] = array( | |
| 407 | + 'language' => $language_website_id, | |
| 408 | + 'location' => $term_url, | |
| 409 | + ); | |
| 410 | + | |
| 411 | + foreach ( $languages_target_ids as $language_id ) { | |
| 412 | + $translated_url = wplng_url_translate( $term_url, $language_id ); | |
| 413 | + | |
| 414 | + if ( ! empty( $translated_url ) && filter_var( $translated_url, FILTER_VALIDATE_URL ) ) { | |
| 415 | + $entry['languages'][] = array( | |
| 416 | + 'language' => $language_id, | |
| 417 | + 'location' => $translated_url, | |
| 418 | + ); | |
| 419 | + } | |
| 420 | + } | |
| 421 | + | |
| 422 | + return $entry; | |
| 423 | +} | |
