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| 1 | +<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName | |
| 2 | +/** | |
| 3 | + * Provides media summary of a post. | |
| 4 | + * | |
| 5 | + * @package automattic/jetpack | |
| 6 | + */ | |
| 7 | + | |
| 8 | +use Automattic\Jetpack\Image_CDN\Image_CDN_Core; | |
| 9 | + | |
| 10 | +/** | |
| 11 | + * Class Jetpack_Media_Summary | |
| 12 | + * | |
| 13 | + * Priority: embed [video] > gallery > image > text | |
| 14 | + */ | |
| 15 | +class Jetpack_Media_Summary { | |
| 16 | + | |
| 17 | + /** | |
| 18 | + * Media cache. | |
| 19 | + * | |
| 20 | + * @var array | |
| 21 | + */ | |
| 22 | + private static $cache = array(); | |
| 23 | + | |
| 24 | + /** | |
| 25 | + * Get media summary for a post. | |
| 26 | + * | |
| 27 | + * @param ?int $post_id Post ID. | |
| 28 | + * @param int $blog_id Blog ID, if applicable. | |
| 29 | + * @param array $args { | |
| 30 | + * Optional. An array of arguments. | |
| 31 | + * @type int $max_words Maximum number of words. | |
| 32 | + * @type int $max_chars Maximum number of characters. | |
| 33 | + * @type bool $include_excerpt Whether to compute the excerpt and return it. Default true. | |
| 34 | + * @type bool $include_counts Whether to compute word/link counts. Default true. | |
| 35 | + * } | |
| 36 | + * | |
| 37 | + * @return array|mixed|void | |
| 38 | + */ | |
| 39 | + public static function get( ?int $post_id, int $blog_id = 0, array $args = array() ) { | |
| 40 | + $post_id = (int) $post_id; | |
| 41 | + | |
| 42 | + $defaults = array( | |
| 43 | + 'max_words' => 16, | |
| 44 | + 'max_chars' => 256, | |
| 45 | + 'include_excerpt' => true, | |
| 46 | + 'include_counts' => true, | |
| 47 | + ); | |
| 48 | + $args = wp_parse_args( $args, $defaults ); | |
| 49 | + | |
| 50 | + $switched = false; | |
| 51 | + if ( ! empty( $blog_id ) && get_current_blog_id() !== $blog_id && function_exists( 'switch_to_blog' ) ) { | |
| 52 | + switch_to_blog( $blog_id ); | |
| 53 | + $switched = true; | |
| 54 | + } else { | |
| 55 | + $blog_id = get_current_blog_id(); | |
| 56 | + } | |
| 57 | + | |
| 58 | + $cache_key = "{$blog_id}_{$post_id}_{$args['max_words']}_{$args['max_chars']}_" | |
| 59 | + . (int) $args['include_excerpt'] . '_' . (int) $args['include_counts']; | |
| 60 | + if ( isset( self::$cache[ $cache_key ] ) ) { | |
| 61 | + if ( $switched ) { | |
| 62 | + restore_current_blog(); | |
| 63 | + } | |
| 64 | + return self::$cache[ $cache_key ]; | |
| 65 | + } | |
| 66 | + | |
| 67 | + if ( ! class_exists( 'Jetpack_Media_Meta_Extractor' ) ) { | |
| 68 | + require_once JETPACK__PLUGIN_DIR . '_inc/lib/class.media-extractor.php'; | |
| 69 | + } | |
| 70 | + | |
| 71 | + $post = get_post( $post_id ); | |
| 72 | + $permalink = get_permalink( $post_id ); | |
| 73 | + | |
| 74 | + $return = array( | |
| 75 | + 'type' => 'standard', | |
| 76 | + 'permalink' => $permalink, | |
| 77 | + 'image' => '', | |
| 78 | + 'excerpt' => '', | |
| 79 | + 'word_count' => 0, | |
| 80 | + 'secure' => array( | |
| 81 | + 'image' => '', | |
| 82 | + ), | |
| 83 | + 'count' => array( | |
| 84 | + 'image' => 0, | |
| 85 | + 'video' => 0, | |
| 86 | + 'word' => 0, | |
| 87 | + 'word_remaining' => 0, | |
| 88 | + 'link' => 0, | |
| 89 | + ), | |
| 90 | + ); | |
| 91 | + | |
| 92 | + if ( $post instanceof WP_Post && empty( $post->post_password ) ) { | |
| 93 | + if ( $args['include_excerpt'] ) { | |
| 94 | + $return['excerpt'] = self::get_excerpt( $post->post_content, $post->post_excerpt, $args['max_words'], $args['max_chars'], $post ); | |
| 95 | + } | |
| 96 | + if ( $args['include_counts'] ) { | |
| 97 | + $return['count']['word'] = self::get_word_count( $post->post_content ); | |
| 98 | + $return['count']['link'] = self::get_link_count( $post->post_content ); | |
| 99 | + // Only compute word_remaining if we have an excerpt. If not, leave the default of 0. | |
| 100 | + if ( $args['include_excerpt'] && '' !== $return['excerpt'] ) { | |
| 101 | + $return['count']['word_remaining'] = self::get_word_remaining_count( $post->post_content, $return['excerpt'] ); | |
| 102 | + } | |
| 103 | + } | |
| 104 | + } | |
| 105 | + | |
| 106 | + $extract = Jetpack_Media_Meta_Extractor::extract( $blog_id, $post_id, Jetpack_Media_Meta_Extractor::ALL ); | |
| 107 | + | |
| 108 | + if ( empty( $extract['has'] ) ) { | |
| 109 | + if ( $switched ) { | |
| 110 | + restore_current_blog(); | |
| 111 | + } | |
| 112 | + self::$cache[ $cache_key ] = $return; | |
| 113 | + return $return; | |
| 114 | + } | |
| 115 | + | |
| 116 | + // Prioritize [some] video embeds. | |
| 117 | + if ( ! empty( $extract['has']['shortcode'] ) ) { | |
| 118 | + foreach ( $extract['shortcode'] as $type => $data ) { | |
| 119 | + switch ( $type ) { | |
| 120 | + case 'videopress': | |
| 121 | + case 'wpvideo': | |
| 122 | + if ( 0 === $return['count']['video'] ) { | |
| 123 | + // If there is no id on the video, then let's just skip this. | |
| 124 | + if ( ! isset( $data['id'][0] ) ) { | |
| 125 | + break; | |
| 126 | + } | |
| 127 | + | |
| 128 | + $guid = $data['id'][0]; | |
| 129 | + $video_info = videopress_get_video_details( $guid ); | |
| 130 | + | |
| 131 | + // Only add the video tags if the guid returns a valid videopress object. | |
| 132 | + if ( $video_info instanceof stdClass ) { | |
| 133 | + // Continue early if we can't find a Video slug. | |
| 134 | + if ( empty( $video_info->files->std->mp4 ) ) { | |
| 135 | + break; | |
| 136 | + } | |
| 137 | + | |
| 138 | + $url = sprintf( | |
| 139 | + 'https://videos.files.wordpress.com/%1$s/%2$s', | |
| 140 | + $guid, | |
| 141 | + $video_info->files->std->mp4 | |
| 142 | + ); | |
| 143 | + | |
| 144 | + $thumbnail = $video_info->poster; | |
| 145 | + if ( ! empty( $thumbnail ) ) { | |
| 146 | + $return['image'] = $thumbnail; | |
| 147 | + $return['secure']['image'] = $thumbnail; | |
| 148 | + } | |
| 149 | + | |
| 150 | + $return['type'] = 'video'; | |
| 151 | + $return['video'] = esc_url_raw( $url ); | |
| 152 | + $return['video_type'] = 'video/mp4'; | |
| 153 | + $return['secure']['video'] = $return['video']; | |
| 154 | + } | |
| 155 | + } | |
| 156 | + ++$return['count']['video']; | |
| 157 | + break; | |
| 158 | + case 'youtube': | |
| 159 | + if ( 0 === $return['count']['video'] ) { | |
| 160 | + if ( ! isset( $extract['shortcode']['youtube']['id'][0] ) ) { | |
| 161 | + break; | |
| 162 | + } | |
| 163 | + $return['type'] = 'video'; | |
| 164 | + $return['video'] = esc_url_raw( 'http://www.youtube.com/watch?feature=player_embedded&v=' . $extract['shortcode']['youtube']['id'][0] ); | |
| 165 | + $return['image'] = self::get_video_poster( 'youtube', $extract['shortcode']['youtube']['id'][0] ); | |
| 166 | + $return['secure']['video'] = self::https( $return['video'] ); | |
| 167 | + $return['secure']['image'] = self::https( $return['image'] ); | |
| 168 | + } | |
| 169 | + ++$return['count']['video']; | |
| 170 | + break; | |
| 171 | + case 'vimeo': | |
| 172 | + if ( 0 === $return['count']['video'] ) { | |
| 173 | + if ( ! isset( $extract['shortcode']['vimeo']['id'][0] ) ) { | |
| 174 | + break; | |
| 175 | + } | |
| 176 | + $return['type'] = 'video'; | |
| 177 | + $return['video'] = esc_url_raw( 'http://vimeo.com/' . $extract['shortcode']['vimeo']['id'][0] ); | |
| 178 | + $return['secure']['video'] = self::https( $return['video'] ); | |
| 179 | + | |
| 180 | + $poster_image = get_post_meta( $post_id, 'vimeo_poster_image', true ); | |
| 181 | + if ( ! empty( $poster_image ) ) { | |
| 182 | + $return['image'] = $poster_image; | |
| 183 | + $poster_url_parts = wp_parse_url( $poster_image ); | |
| 184 | + $return['secure']['image'] = 'https://secure-a.vimeocdn.com' . $poster_url_parts['path']; | |
| 185 | + } | |
| 186 | + } | |
| 187 | + ++$return['count']['video']; | |
| 188 | + break; | |
| 189 | + } | |
| 190 | + } | |
| 191 | + } | |
| 192 | + | |
| 193 | + if ( ! empty( $extract['has']['embed'] ) ) { | |
| 194 | + foreach ( $extract['embed']['url'] as $embed ) { | |
| 195 | + if ( preg_match( '/((youtube|vimeo|dailymotion)\.com|youtu.be)/', $embed ) ) { | |
| 196 | + if ( 0 === $return['count']['video'] ) { | |
| 197 | + $return['type'] = 'video'; | |
| 198 | + $return['video'] = 'http://' . $embed; | |
| 199 | + $return['secure']['video'] = self::https( $return['video'] ); | |
| 200 | + if ( str_contains( $embed, 'youtube' ) ) { | |
| 201 | + $return['image'] = self::get_video_poster( 'youtube', jetpack_get_youtube_id( $return['video'] ) ); | |
| 202 | + $return['secure']['image'] = self::https( $return['image'] ); | |
| 203 | + } elseif ( str_contains( $embed, 'youtu.be' ) ) { | |
| 204 | + $youtube_id = jetpack_get_youtube_id( $return['video'] ); | |
| 205 | + $return['video'] = 'http://youtube.com/watch?v=' . $youtube_id . '&feature=youtu.be'; | |
| 206 | + $return['secure']['video'] = self::https( $return['video'] ); | |
| 207 | + $return['image'] = self::get_video_poster( 'youtube', jetpack_get_youtube_id( $return['video'] ) ); | |
| 208 | + $return['secure']['image'] = self::https( $return['image'] ); | |
| 209 | + } elseif ( str_contains( $embed, 'vimeo' ) ) { | |
| 210 | + $poster_image = get_post_meta( $post_id, 'vimeo_poster_image', true ); | |
| 211 | + if ( ! empty( $poster_image ) ) { | |
| 212 | + $return['image'] = $poster_image; | |
| 213 | + $poster_url_parts = wp_parse_url( $poster_image ); | |
| 214 | + $return['secure']['image'] = 'https://secure-a.vimeocdn.com' . $poster_url_parts['path']; | |
| 215 | + } | |
| 216 | + } elseif ( str_contains( $embed, 'dailymotion' ) ) { | |
| 217 | + $return['image'] = str_replace( 'dailymotion.com/video/', 'dailymotion.com/thumbnail/video/', $embed ); | |
| 218 | + $return['image'] = wp_parse_url( $return['image'], PHP_URL_SCHEME ) === null ? 'http://' . $return['image'] : $return['image']; | |
| 219 | + $return['secure']['image'] = self::https( $return['image'] ); | |
| 220 | + } | |
| 221 | + } | |
| 222 | + ++$return['count']['video']; | |
| 223 | + } | |
| 224 | + } | |
| 225 | + } | |
| 226 | + | |
| 227 | + // Do we really want to make the video the primary focus of the post? | |
| 228 | + if ( 'video' === $return['type'] ) { | |
| 229 | + $content = wpautop( wp_strip_all_tags( $post->post_content ) ); | |
| 230 | + $paragraphs = explode( '</p>', $content ); | |
| 231 | + $number_of_paragraphs = 0; | |
| 232 | + | |
| 233 | + foreach ( $paragraphs as $i => $paragraph ) { | |
| 234 | + // Don't include blank lines as a paragraph. | |
| 235 | + if ( '' === trim( $paragraph ) ) { | |
| 236 | + unset( $paragraphs[ $i ] ); | |
| 237 | + continue; | |
| 238 | + } | |
| 239 | + ++$number_of_paragraphs; | |
| 240 | + } | |
| 241 | + | |
| 242 | + $number_of_paragraphs -= $return['count']['video']; // subtract amount for videos. | |
| 243 | + | |
| 244 | + // More than 2 paragraph? The video is not the primary focus so we can do some more analysis. | |
| 245 | + if ( $number_of_paragraphs > 2 ) { | |
| 246 | + $return['type'] = 'standard'; | |
| 247 | + } | |
| 248 | + } | |
| 249 | + | |
| 250 | + // If we don't have any prioritized embed... | |
| 251 | + if ( 'standard' === $return['type'] ) { | |
| 252 | + if ( ( ! empty( $extract['has']['gallery'] ) || ! empty( $extract['shortcode']['gallery']['count'] ) ) && ! empty( $extract['image'] ) ) { | |
| 253 | + // ... Then we prioritize galleries first (multiple images returned) | |
| 254 | + $return['type'] = 'gallery'; | |
| 255 | + $return['images'] = $extract['image']; | |
| 256 | + foreach ( $return['images'] as $image ) { | |
| 257 | + $return['secure']['images'][] = array( 'url' => self::ssl_img( $image['url'] ) ); | |
| 258 | + ++$return['count']['image']; | |
| 259 | + } | |
| 260 | + } elseif ( ! empty( $extract['has']['image'] ) ) { | |
| 261 | + // ... Or we try and select a single image that would make sense. | |
| 262 | + $content = wpautop( wp_strip_all_tags( $post->post_content ) ); | |
| 263 | + $paragraphs = explode( '</p>', $content ); | |
| 264 | + $number_of_paragraphs = 0; | |
| 265 | + | |
| 266 | + foreach ( $paragraphs as $i => $paragraph ) { | |
| 267 | + // Don't include 'actual' captions as a paragraph. | |
| 268 | + if ( str_contains( $paragraph, '[caption' ) ) { | |
| 269 | + unset( $paragraphs[ $i ] ); | |
| 270 | + continue; | |
| 271 | + } | |
| 272 | + // Don't include blank lines as a paragraph. | |
| 273 | + if ( '' === trim( $paragraph ) ) { | |
| 274 | + unset( $paragraphs[ $i ] ); | |
| 275 | + continue; | |
| 276 | + } | |
| 277 | + ++$number_of_paragraphs; | |
| 278 | + } | |
| 279 | + | |
| 280 | + // @phan-suppress-next-line PhanTypeMismatchDimFetch -- Phan is understandably confused, as $extract has many forms, including this one. | |
| 281 | + if ( ! empty( $extract['image'][0]['url'] ) ) { | |
| 282 | + $return['image'] = $extract['image'][0]['url']; | |
| 283 | + $return['secure']['image'] = self::ssl_img( $return['image'] ); | |
| 284 | + ++$return['count']['image']; | |
| 285 | + } | |
| 286 | + | |
| 287 | + if ( $number_of_paragraphs <= 2 && is_countable( $extract['image'] ) && 1 === count( $extract['image'] ) ) { | |
| 288 | + // If we have lots of text or images, let's not treat it as an image post, but return its first image. | |
| 289 | + $return['type'] = 'image'; | |
| 290 | + } | |
| 291 | + } | |
| 292 | + } | |
| 293 | + | |
| 294 | + if ( $switched ) { | |
| 295 | + restore_current_blog(); | |
| 296 | + } | |
| 297 | + | |
| 298 | + /** | |
| 299 | + * Allow a theme or plugin to inspect and ultimately change the media summary. | |
| 300 | + * | |
| 301 | + * @since 4.4.0 | |
| 302 | + * | |
| 303 | + * @param array $data The calculated media summary data. | |
| 304 | + * @param int $post_id The id of the post this data applies to. | |
| 305 | + */ | |
| 306 | + $return = apply_filters( 'jetpack_media_summary_output', $return, $post_id ); | |
| 307 | + | |
| 308 | + self::$cache[ $cache_key ] = $return; | |
| 309 | + | |
| 310 | + return $return; | |
| 311 | + } | |
| 312 | + | |
| 313 | + /** | |
| 314 | + * Converts http to https:// | |
| 315 | + * | |
| 316 | + * @param string $str URL. | |
| 317 | + * | |
| 318 | + * @return string URL. | |
| 319 | + */ | |
| 320 | + public static function https( $str ) { | |
| 321 | + return str_replace( 'http://', 'https://', $str ); | |
| 322 | + } | |
| 323 | + | |
| 324 | + /** | |
| 325 | + * Returns a Photonized version of the URL. | |
| 326 | + * | |
| 327 | + * @param string $url URL. | |
| 328 | + * | |
| 329 | + * @return string URL. | |
| 330 | + */ | |
| 331 | + public static function ssl_img( $url ) { | |
| 332 | + if ( str_contains( $url, 'files.wordpress.com' ) ) { | |
| 333 | + return self::https( $url ); | |
| 334 | + } else { | |
| 335 | + return self::https( Image_CDN_Core::cdn_url( $url ) ); | |
| 336 | + } | |
| 337 | + } | |
| 338 | + | |
| 339 | + /** | |
| 340 | + * Get the video poster. | |
| 341 | + * | |
| 342 | + * @param string $type Video service. | |
| 343 | + * @param string $id Video ID for the service. | |
| 344 | + * | |
| 345 | + * @return string URL of image thumbnail for the video. | |
| 346 | + */ | |
| 347 | + public static function get_video_poster( $type, $id ) { | |
| 348 | + if ( 'videopress' === $type ) { | |
| 349 | + if ( function_exists( 'video_get_highest_resolution_image_url' ) ) { | |
| 350 | + return video_get_highest_resolution_image_url( $id ); | |
| 351 | + } elseif ( class_exists( 'VideoPress_Video' ) ) { | |
| 352 | + $video = new VideoPress_Video( $id ); | |
| 353 | + return $video->poster_frame_uri; | |
| 354 | + } | |
| 355 | + } elseif ( 'youtube' === $type ) { | |
| 356 | + return 'http://img.youtube.com/vi/' . $id . '/0.jpg'; | |
| 357 | + } | |
| 358 | + } | |
| 359 | + | |
| 360 | + /** | |
| 361 | + * Clean text of shortcodes and tags. | |
| 362 | + * | |
| 363 | + * @param string $text Dirty text. | |
| 364 | + * @param bool $preserve_urls When true, keep http(s) URLs in the text instead of stripping them. Default false. | |
| 365 | + * | |
| 366 | + * @return string Clean text. | |
| 367 | + */ | |
| 368 | + public static function clean_text( $text, $preserve_urls = false ) { | |
| 369 | + $text = strip_shortcodes( wp_strip_all_tags( $text ) ); | |
| 370 | + | |
| 371 | + if ( ! $preserve_urls ) { | |
| 372 | + $text = preg_replace( '@https?://[\S]+@', '', $text ); | |
| 373 | + } | |
| 374 | + | |
| 375 | + return trim( preg_replace( '/[\s]+/', ' ', $text ) ); | |
| 376 | + } | |
| 377 | + | |
| 378 | + /** | |
| 379 | + * Retrieve an excerpt for the post summary. | |
| 380 | + * | |
| 381 | + * This function works around a suspected problem with Core. If resolved, this function should be simplified. | |
| 382 | + * | |
| 383 | + * @link https://github.com/Automattic/jetpack/pull/8510 | |
| 384 | + * @link https://core.trac.wordpress.org/ticket/42814 | |
| 385 | + * | |
| 386 | + * @param string $post_content The post's content. | |
| 387 | + * @param string $post_excerpt The post's excerpt. Empty if none was explicitly set. | |
| 388 | + * @param int $max_words Maximum number of words for the excerpt. Used on wp.com. Default 16. | |
| 389 | + * @param int $max_chars Maximum characters in the excerpt. Used on wp.com. Default 256. | |
| 390 | + * @param WP_Post $requested_post The post object. | |
| 391 | + * @param bool $preserve_urls When true, keep http(s) URLs in the excerpt instead of stripping them. Default false. | |
| 392 | + * @return string Post excerpt. | |
| 393 | + **/ | |
| 394 | + public static function get_excerpt( $post_content, $post_excerpt, $max_words = 16, $max_chars = 256, $requested_post = null, $preserve_urls = false ) { | |
| 395 | + global $post; | |
| 396 | + $original_post = $post; // Saving the global for later use. | |
| 397 | + if ( empty( $post_excerpt ) && function_exists( 'wpcom_enhanced_excerpt_extract_excerpt' ) ) { | |
| 398 | + return self::clean_text( | |
| 399 | + wpcom_enhanced_excerpt_extract_excerpt( | |
| 400 | + array( | |
| 401 | + 'text' => $post_content, | |
| 402 | + 'excerpt_only' => true, | |
| 403 | + 'show_read_more' => false, | |
| 404 | + 'max_words' => $max_words, | |
| 405 | + 'max_chars' => $max_chars, | |
| 406 | + 'read_more_threshold' => 25, | |
| 407 | + ) | |
| 408 | + ), | |
| 409 | + $preserve_urls | |
| 410 | + ); | |
| 411 | + } elseif ( $requested_post instanceof WP_Post ) { | |
| 412 | + // @todo Refactor to not need to override the global. | |
| 413 | + // phpcs:ignore: WordPress.WP.GlobalVariablesOverride.Prohibited | |
| 414 | + $post = $requested_post; // setup_postdata does not set the global. | |
| 415 | + setup_postdata( $post ); | |
| 416 | + /** This filter is documented in core/src/wp-includes/post-template.php */ | |
| 417 | + $post_excerpt = apply_filters( 'get_the_excerpt', $post_excerpt, $post ); | |
| 418 | + // phpcs:ignore: WordPress.WP.GlobalVariablesOverride.Prohibited | |
| 419 | + $post = $original_post; // wp_reset_postdata uses the $post global. | |
| 420 | + wp_reset_postdata(); | |
| 421 | + return self::clean_text( $post_excerpt, $preserve_urls ); | |
| 422 | + } | |
| 423 | + return ''; | |
| 424 | + } | |
| 425 | + | |
| 426 | + /** | |
| 427 | + * Split a string into an array of words. | |
| 428 | + * | |
| 429 | + * @param string $text Post content or excerpt. | |
| 430 | + * | |
| 431 | + * @return array Array of words. | |
| 432 | + */ | |
| 433 | + public static function split_content_in_words( $text ) { | |
| 434 | + $words = preg_split( '/[\s!?;,.]+/', $text, -1, PREG_SPLIT_NO_EMPTY ); | |
| 435 | + | |
| 436 | + // Return an empty array if the split above fails. | |
| 437 | + return $words ? $words : array(); | |
| 438 | + } | |
| 439 | + | |
| 440 | + /** | |
| 441 | + * Get the word count. | |
| 442 | + * | |
| 443 | + * @param string $post_content Post content. | |
| 444 | + * | |
| 445 | + * @return int Word count. | |
| 446 | + */ | |
| 447 | + public static function get_word_count( $post_content ) { | |
| 448 | + return count( self::split_content_in_words( self::clean_text( $post_content ) ) ); | |
| 449 | + } | |
| 450 | + | |
| 451 | + /** | |
| 452 | + * Get remainder word count (after the excerpt). | |
| 453 | + * | |
| 454 | + * @param string $post_content Post content. | |
| 455 | + * @param string $excerpt_content Excerpt content. | |
| 456 | + * | |
| 457 | + * @return int Number of words after the excerpt. | |
| 458 | + */ | |
| 459 | + public static function get_word_remaining_count( $post_content, $excerpt_content ) { | |
| 460 | + $content_word_count = count( self::split_content_in_words( self::clean_text( $post_content ) ) ); | |
| 461 | + $excerpt_word_count = count( self::split_content_in_words( self::clean_text( $excerpt_content ) ) ); | |
| 462 | + | |
| 463 | + return $content_word_count - $excerpt_word_count; | |
| 464 | + } | |
| 465 | + | |
| 466 | + /** | |
| 467 | + * Counts the number of links in a post. | |
| 468 | + * | |
| 469 | + * @param string $post_content Post content. | |
| 470 | + * | |
| 471 | + * @return false|int Number of links. | |
| 472 | + */ | |
| 473 | + public static function get_link_count( $post_content ) { | |
| 474 | + return preg_match_all( '/\<a[\> ]/', $post_content, $matches ); | |
| 475 | + } | |
| 476 | +} | |
