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Jetpack – WP Security, Backup, Speed, & Growth v11.2.2
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jetpack / functions.opengraph.php

functions.opengraph.php in Jetpack – WP Security, Backup, Speed, & Growth 11.2.2, at functions.opengraph.php

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1 <?php
2 /**
3 * Open Graph Tags
4 *
5 * Add Open Graph tags so that Facebook (and any other service that supports them)
6 * can crawl the site better and we provide a better sharing experience.
7 *
8 * @link https://ogp.me/
9 * @link https://developers.facebook.com/docs/opengraph/
10 *
11 * @package automattic/jetpack
12 */
13
14 add_action( 'wp_head', 'jetpack_og_tags' );
15 add_action( 'web_stories_story_head', 'jetpack_og_tags' );
16
17 /**
18 * Outputs Open Graph tags generated by Jetpack.
19 */
20 function jetpack_og_tags() {
21 global $post;
22 $data = $post; // so that we don't accidentally explode the global.
23
24 $is_amp_response = ( class_exists( 'Jetpack_AMP_Support' ) && Jetpack_AMP_Support::is_amp_request() );
25
26 // Disable the widont filter on WP.com to avoid stray &nbsps.
27 $disable_widont = remove_filter( 'the_title', 'widont' );
28
29 $og_output = "\n";
30 if ( ! $is_amp_response ) { // Because AMP optimizes the order or the nodes in the head.
31 $og_output .= "<!-- Jetpack Open Graph Tags -->\n";
32 }
33 $tags = array();
34
35 /**
36 * Filter the minimum width of the images used in Jetpack Open Graph Meta Tags.
37 *
38 * @module sharedaddy, publicize
39 *
40 * @since 2.0.0
41 *
42 * @param int 200 Minimum image width used in Jetpack Open Graph Meta Tags.
43 */
44 $image_width = absint( apply_filters( 'jetpack_open_graph_image_width', 200 ) );
45 /**
46 * Filter the minimum height of the images used in Jetpack Open Graph Meta Tags.
47 *
48 * @module sharedaddy, publicize
49 *
50 * @since 2.0.0
51 *
52 * @param int 200 Minimum image height used in Jetpack Open Graph Meta Tags.
53 */
54 $image_height = absint( apply_filters( 'jetpack_open_graph_image_height', 200 ) );
55 $description_length = 197;
56
57 if ( is_home() || is_front_page() ) {
58 $site_type = Jetpack_Options::get_option_and_ensure_autoload( 'open_graph_protocol_site_type', '' );
59 $tags['og:type'] = ! empty( $site_type ) ? $site_type : 'website';
60 $tags['og:title'] = get_bloginfo( 'name' );
61 $tags['og:description'] = get_bloginfo( 'description' );
62
63 $front_page_id = get_option( 'page_for_posts' );
64 if ( 'page' === get_option( 'show_on_front' ) && $front_page_id && is_home() ) {
65 $tags['og:url'] = get_permalink( $front_page_id );
66 } else {
67 $tags['og:url'] = home_url( '/' );
68 }
69
70 // Associate a blog's root path with one or more Facebook accounts.
71 $facebook_admins = Jetpack_Options::get_option_and_ensure_autoload( 'facebook_admins', array() );
72 if ( ! empty( $facebook_admins ) ) {
73 $tags['fb:admins'] = $facebook_admins;
74 }
75 } elseif ( is_author() ) {
76 $tags['og:type'] = 'profile';
77
78 $author = get_queried_object();
79
80 if ( is_a( $author, 'WP_User' ) ) {
81 $tags['og:title'] = $author->display_name;
82 if ( ! empty( $author->user_url ) ) {
83 $tags['og:url'] = $author->user_url;
84 } else {
85 $tags['og:url'] = get_author_posts_url( $author->ID );
86 }
87 $tags['og:description'] = $author->description;
88 $tags['profile:first_name'] = get_the_author_meta( 'first_name', $author->ID );
89 $tags['profile:last_name'] = get_the_author_meta( 'last_name', $author->ID );
90 }
91 } elseif ( is_archive() ) {
92 $tags['og:type'] = 'website';
93 $tags['og:title'] = wp_get_document_title();
94
95 $archive = get_queried_object();
96 if ( ! empty( $archive ) ) {
97 if ( is_category() || is_tag() || is_tax() ) {
98 $tags['og:url'] = get_term_link( $archive->term_id, $archive->taxonomy );
99 $tags['og:description'] = $archive->description;
100 } elseif ( is_post_type_archive() ) {
101 $tags['og:url'] = get_post_type_archive_link( $archive->name );
102 $tags['og:description'] = $archive->description;
103 }
104 }
105 } elseif ( is_singular() && is_a( $data, 'WP_Post' ) ) {
106 $tags['og:type'] = 'article';
107 if ( empty( $data->post_title ) ) {
108 $tags['og:title'] = ' ';
109 } else {
110 /** This filter is documented in core/src/wp-includes/post-template.php */
111 $tags['og:title'] = wp_kses( apply_filters( 'the_title', $data->post_title, $data->ID ), array() );
112 }
113
114 $tags['og:url'] = get_permalink( $data->ID );
115 if ( ! post_password_required() ) {
116 /*
117 * If the post author set an excerpt, use that.
118 * Otherwise, pick the post content that comes before the More tag if there is one.
119 * Do not use the post content if it contains premium content.
120 */
121 if ( ! empty( $data->post_excerpt ) ) {
122 $tags['og:description'] = jetpack_og_get_description( $data->post_excerpt );
123 } elseif ( ! has_block( 'premium-content/container', $data->post_content ) ) {
124 $excerpt = explode( '<!--more-->', $data->post_content )[0];
125 $tags['og:description'] = jetpack_og_get_description( $excerpt );
126 }
127 }
128
129 $tags['article:published_time'] = gmdate( 'c', strtotime( $data->post_date_gmt ) );
130 $tags['article:modified_time'] = gmdate( 'c', strtotime( $data->post_modified_gmt ) );
131 if ( post_type_supports( get_post_type( $data ), 'author' ) && isset( $data->post_author ) ) {
132 $publicize_facebook_user = get_post_meta( $data->ID, '_publicize_facebook_user', true );
133 if ( ! empty( $publicize_facebook_user ) ) {
134 $tags['article:author'] = esc_url( $publicize_facebook_user );
135 }
136 }
137 } elseif ( is_search() ) {
138 if ( '' !== get_query_var( 's', '' ) ) {
139 $tags['og:title'] = wp_get_document_title();
140 }
141 }
142 /**
143 * Allow plugins to inject additional template-specific Open Graph tags.
144 *
145 * @module sharedaddy, publicize
146 *
147 * @since 3.0.0
148 *
149 * @param array $tags Array of Open Graph Meta tags.
150 * @param array $args Array of image size parameters.
151 */
152 $tags = apply_filters( 'jetpack_open_graph_base_tags', $tags, compact( 'image_width', 'image_height' ) );
153
154 // Re-enable widont if we had disabled it.
155 if ( $disable_widont ) {
156 add_filter( 'the_title', 'widont' );
157 }
158
159 /**
160 * Do not return any Open Graph Meta tags if we don't have any info about a post.
161 *
162 * @module sharedaddy, publicize
163 *
164 * @since 3.0.0
165 *
166 * @param bool true Do not return any Open Graph Meta tags if we don't have any info about a post.
167 */
168 if ( empty( $tags ) && apply_filters( 'jetpack_open_graph_return_if_empty', true ) ) {
169 return;
170 }
171
172 $tags['og:site_name'] = get_bloginfo( 'name' );
173
174 // Get image info and build tags.
175 if ( ! post_password_required() ) {
176 $image_info = jetpack_og_get_image( $image_width, $image_height );
177 $tags['og:image'] = $image_info['src'];
178
179 if ( ! empty( $image_info['width'] ) ) {
180 $tags['og:image:width'] = (int) $image_info['width'];
181 }
182 if ( ! empty( $image_info['height'] ) ) {
183 $tags['og:image:height'] = (int) $image_info['height'];
184 }
185 // If we have an image, add the alt text even if it's empty.
186 if ( ! empty( $image_info['src'] ) && isset( $image_info['alt_text'] ) ) {
187 $tags['og:image:alt'] = esc_attr( $image_info['alt_text'] );
188 }
189 }
190
191 // Facebook whines if you give it an empty title.
192 if ( empty( $tags['og:title'] ) ) {
193 $tags['og:title'] = __( '(no title)', 'jetpack' );
194 }
195
196 // Shorten the description if it's too long.
197 if ( isset( $tags['og:description'] ) ) {
198 $tags['og:description'] = strlen( $tags['og:description'] ) > $description_length ? mb_substr( $tags['og:description'], 0, $description_length ) . '' : $tags['og:description'];
199 }
200
201 // Try to add OG locale tag if the WP->FB data mapping exists.
202 if ( defined( 'JETPACK__GLOTPRESS_LOCALES_PATH' ) && file_exists( JETPACK__GLOTPRESS_LOCALES_PATH ) ) {
203 require_once JETPACK__GLOTPRESS_LOCALES_PATH;
204 $_locale = get_locale();
205
206 // We have to account for w.org vs WP.com locale divergence.
207 if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
208 $gp_locale = GP_Locales::by_field( 'slug', $_locale );
209 } else {
210 $gp_locale = GP_Locales::by_field( 'wp_locale', $_locale );
211 }
212 }
213
214 if ( isset( $gp_locale->facebook_locale ) && ! empty( $gp_locale->facebook_locale ) ) {
215 $tags['og:locale'] = $gp_locale->facebook_locale;
216 }
217
218 /**
219 * Allow the addition of additional Open Graph Meta tags, or modify the existing tags.
220 *
221 * @module sharedaddy, publicize
222 *
223 * @since 2.0.0
224 *
225 * @param array $tags Array of Open Graph Meta tags.
226 * @param array $args Array of image size parameters.
227 */
228 $tags = apply_filters( 'jetpack_open_graph_tags', $tags, compact( 'image_width', 'image_height' ) );
229
230 // secure_urls need to go right after each og:image to work properly so we will abstract them here.
231 $tags['og:image:secure_url'] = ( empty( $tags['og:image:secure_url'] ) ) ? '' : $tags['og:image:secure_url'];
232 $secure = $tags['og:image:secure_url'];
233 unset( $tags['og:image:secure_url'] );
234 $secure_image_num = 0;
235
236 $allowed_empty_tags = array(
237 'og:image:alt',
238 );
239
240 foreach ( (array) $tags as $tag_property => $tag_content ) {
241 // to accommodate multiple images.
242 $tag_content = (array) $tag_content;
243 $tag_content = array_unique( $tag_content );
244
245 foreach ( $tag_content as $tag_content_single ) {
246 if ( empty( $tag_content_single ) && ! in_array( $tag_property, $allowed_empty_tags, true ) ) {
247 continue; // Only allow certain empty tags.
248 }
249
250 switch ( $tag_property ) {
251 case 'og:url':
252 case 'og:image':
253 case 'og:image:url':
254 case 'og:image:secure_url':
255 case 'og:audio':
256 case 'og:audio:url':
257 case 'og:audio:secure_url':
258 case 'og:video':
259 case 'og:video:url':
260 case 'og:video:secure_url':
261 $og_tag = sprintf( '<meta property="%s" content="%s" />', esc_attr( $tag_property ), esc_url( $tag_content_single ) );
262 break;
263 default:
264 $og_tag = sprintf( '<meta property="%s" content="%s" />', esc_attr( $tag_property ), esc_attr( $tag_content_single ) );
265 }
266 /**
267 * Filter the HTML Output of each Open Graph Meta tag.
268 *
269 * @module sharedaddy, publicize
270 *
271 * @since 2.0.0
272 *
273 * @param string $og_tag HTML HTML Output of each Open Graph Meta tag.
274 */
275 $og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
276 $og_output .= "\n";
277
278 if ( 'og:image' === $tag_property ) {
279 if ( is_array( $secure ) && ! empty( $secure[ $secure_image_num ] ) ) {
280 $og_tag = sprintf( '<meta property="og:image:secure_url" content="%s" />', esc_url( $secure[ $secure_image_num ] ) );
281 /** This filter is documented in functions.opengraph.php */
282 $og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
283 $og_output .= "\n";
284 } elseif ( ! is_array( $secure ) && ! empty( $secure ) ) {
285 $og_tag = sprintf( '<meta property="og:image:secure_url" content="%s" />', esc_url( $secure ) );
286 /** This filter is documented in functions.opengraph.php */
287 $og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
288 $og_output .= "\n";
289 }
290 $secure_image_num++;
291 }
292 }
293 }
294
295 if ( ! $is_amp_response ) { // Because AMP optimizes the order or the nodes in the head.
296 $og_output .= "\n<!-- End Jetpack Open Graph Tags -->";
297 }
298 $og_output .= "\n";
299 // This is trusted output or added by a filter.
300 echo $og_output; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
301 }
302
303 /**
304 * Returns an image used in social shares.
305 *
306 * @since 2.0.0
307 *
308 * @param int $width Minimum width for the image. Default is 200 based on Facebook's requirement.
309 * @param int $height Minimum height for the image. Default is 200 based on Facebook's requirement.
310 * @param null $deprecated Deprecated.
311 *
312 * @return array The source ('src'), 'width', and 'height' of the image.
313 */
314 function jetpack_og_get_image( $width = 200, $height = 200, $deprecated = null ) {
315 if ( ! empty( $deprecated ) ) {
316 _deprecated_argument( __FUNCTION__, 'jetpack-6.6.0' );
317 }
318 $image = array();
319
320 if ( is_singular() && ! is_home() ) {
321 // Grab obvious image if post is an attachment page for an image.
322 if ( is_attachment( get_the_ID() ) && 'image' === substr( get_post_mime_type(), 0, 5 ) ) {
323 $image['src'] = wp_get_attachment_url( get_the_ID() );
324 $image['alt_text'] = Jetpack_PostImages::get_alt_text( get_the_ID() );
325 }
326
327 // Attempt to find something good for this post using our generalized PostImages code.
328 if ( empty( $image ) && class_exists( 'Jetpack_PostImages' ) ) {
329 $post_image = Jetpack_PostImages::get_image(
330 get_the_ID(),
331 array(
332 'width' => $width,
333 'height' => $height,
334 )
335 );
336 if ( ! empty( $post_image ) && is_array( $post_image ) ) {
337 $image['src'] = $post_image['src'];
338 if ( isset( $post_image['src_width'], $post_image['src_height'] ) ) {
339 $image['width'] = $post_image['src_width'];
340 $image['height'] = $post_image['src_height'];
341 }
342 if ( ! empty( $post_image['alt_text'] ) ) {
343 $image['alt_text'] = $post_image['alt_text'];
344 }
345 }
346 }
347 } elseif ( is_author() ) {
348 $author = get_queried_object();
349 if ( is_a( $author, 'WP_User' ) ) {
350 $image['src'] = get_avatar_url(
351 $author->user_email,
352 array(
353 'size' => $width,
354 )
355 );
356 $image['alt_text'] = $author->display_name;
357 }
358 }
359
360 // First fall back, blavatar.
361 if ( empty( $image ) && function_exists( 'blavatar_domain' ) ) {
362 $blavatar_domain = blavatar_domain( site_url() );
363 if ( blavatar_exists( $blavatar_domain ) ) {
364 $image['src'] = blavatar_url( $blavatar_domain, 'img', $width, false, true );
365 $image['width'] = $width;
366 $image['height'] = $height;
367 }
368 }
369
370 // Second fall back, Site Logo.
371 if ( empty( $image ) && ( function_exists( 'jetpack_has_site_logo' ) && jetpack_has_site_logo() ) ) {
372 $image_id = jetpack_get_site_logo( 'id' );
373 $logo = wp_get_attachment_image_src( $image_id, 'full' );
374 if (
375 isset( $logo[0], $logo[1], $logo[2] )
376 && ( _jetpack_og_get_image_validate_size( $logo[1], $logo[2], $width, $height ) )
377 ) {
378 $image['src'] = $logo[0];
379 $image['width'] = $logo[1];
380 $image['height'] = $logo[2];
381 $image['alt_text'] = Jetpack_PostImages::get_alt_text( $image_id );
382 }
383 }
384
385 // Third fall back, Core Site Icon, if valid in size.
386 if ( empty( $image ) && has_site_icon() ) {
387 $image_id = get_option( 'site_icon' );
388 $icon = wp_get_attachment_image_src( $image_id, 'full' );
389 if (
390 isset( $icon[0], $icon[1], $icon[2] )
391 && ( _jetpack_og_get_image_validate_size( $icon[1], $icon[2], $width, $height ) )
392 ) {
393 $image['src'] = $icon[0];
394 $image['width'] = $icon[1];
395 $image['height'] = $icon[2];
396 $image['alt_text'] = Jetpack_PostImages::get_alt_text( $image_id );
397 }
398 }
399
400 // Final fall back, blank image.
401 if ( empty( $image ) ) {
402 /**
403 * Filter the default Open Graph Image tag, used when no Image can be found in a post.
404 *
405 * @since 3.0.0
406 *
407 * @param string $str Default Image URL.
408 */
409 $image['src'] = apply_filters( 'jetpack_open_graph_image_default', 'https://s0.wp.com/i/blank.jpg' );
410 }
411
412 // If we didn't get an explicit alt tag from the image, set a default.
413 if ( empty( $image['alt_text'] ) ) {
414 /**
415 * Filter the default Open Graph image alt text, used when the Open Graph image from the post does not have an alt text.
416 *
417 * @since 10.4
418 *
419 * @param string $str Default Open Graph image alt text.
420 */
421 $image['alt_text'] = apply_filters( 'jetpack_open_graph_image_default_alt_text', '' );
422 }
423
424 return $image;
425 }
426
427 /**
428 * Validate the width and height against required width and height
429 *
430 * @param int $width Width of the image.
431 * @param int $height Height of the image.
432 * @param int $req_width Required width to pass validation.
433 * @param int $req_height Required height to pass validation.
434 *
435 * @return bool - True if the image passed the required size validation
436 */
437 function _jetpack_og_get_image_validate_size( $width, $height, $req_width, $req_height ) {
438 if ( ! $width || ! $height ) {
439 return false;
440 }
441
442 $valid_width = ( $width >= $req_width );
443 $valid_height = ( $height >= $req_height );
444 $is_image_acceptable = $valid_width && $valid_height;
445
446 return $is_image_acceptable;
447 }
448
449 /**
450 * Gets a gravatar URL of the specified size.
451 *
452 * @param string $email E-mail address to get gravatar for.
453 * @param int $width Size of returned gravatar.
454 * @return array|bool|mixed|string
455 */
456 function jetpack_og_get_image_gravatar( $email, $width ) {
457 return get_avatar_url(
458 $email,
459 array(
460 'size' => $width,
461 )
462 );
463 }
464
465 /**
466 * Clean up text meant to be used as Description Open Graph tag.
467 *
468 * There should be:
469 * - no links
470 * - no shortcodes
471 * - no html tags or their contents
472 * - not too many words.
473 *
474 * @param string $description Text coming from WordPress (autogenerated or manually generated by author).
475 * @param WP_Post|null $data Information about our post.
476 *
477 * @return string $description Cleaned up description string.
478 */
479 function jetpack_og_get_description( $description = '', $data = null ) {
480 // Remove tags such as <style or <script.
481 $description = wp_strip_all_tags( $description );
482
483 /*
484 * Clean up any plain text entities left into formatted entities.
485 * Intentionally not using a filter to prevent pollution.
486 * @see https://github.com/Automattic/jetpack/pull/2899#issuecomment-151957382
487 */
488 $description = wp_kses(
489 trim(
490 convert_chars(
491 wptexturize( $description )
492 )
493 ),
494 array()
495 );
496
497 // Remove shortcodes.
498 $description = strip_shortcodes( $description );
499
500 // Remove links.
501 $description = preg_replace(
502 '@https?://[\S]+@',
503 '',
504 $description
505 );
506
507 /*
508 * Limit things to a small text blurb.
509 * There isn't a hard limit set by Facebook, so let's rely on WP's own limit.
510 * (55 words or the localized equivalent).
511 * This limit can be customized with the wp_trim_words filter.
512 */
513 $description = wp_trim_words( $description );
514
515 // Let's set a default if we have no text by now.
516 if ( empty( $description ) ) {
517 /**
518 * Filter the fallback `og:description` used when no excerpt information is provided.
519 *
520 * @module sharedaddy, publicize
521 *
522 * @since 3.9.0
523 *
524 * @param string $var Fallback og:description. Default is translated `Visit the post for more'.
525 * @param object $data Post object for the current post.
526 */
527 $description = apply_filters(
528 'jetpack_open_graph_fallback_description',
529 __( 'Visit the post for more.', 'jetpack' ),
530 $data
531 );
532 }
533
534 return $description;
535 }
536