wp-includes/class-wp-embed.php:196The do_shortcode() callback function.
$attrarray$widthint
$heightint
$urlstringoptional''string|false4 hooks fire while WP_Embed::shortcode() runs, in this order:
Filters the oEmbed TTL value (time to live).
Filters whether to inspect the given URL for discoverable link tags.
Filters the cached oEmbed HTML.
public function shortcode( $attr, $url = '' ) { $post = get_post(); if ( empty( $url ) && ! empty( $attr['src'] ) ) { $url = $attr['src']; } $this->last_url = $url; if ( empty( $url ) ) { $this->last_attr = $attr; return ''; } $rawattr = $attr; $attr = wp_parse_args( $attr, wp_embed_defaults( $url ) ); $this->last_attr = $attr; /* * KSES converts & into & and we need to undo this. * See https://core.trac.wordpress.org/ticket/11311 */ $url = str_replace( '&', '&', $url ); // Look for known internal handlers. $embed_handler_html = $this->get_embed_handler_html( $rawattr, $url ); if ( false !== $embed_handler_html ) { return $embed_handler_html; } $post_id = ( ! empty( $post->ID ) ) ? $post->ID : null; // Potentially set by WP_Embed::cache_oembed(). if ( ! empty( $this->post_ID ) ) { $post_id = $this->post_ID; } // Check for a cached result (stored as custom post or in the post meta). $key_suffix = md5( $url . serialize( $attr ) ); $cachekey = '_oembed_' . $key_suffix; $cachekey_time = '_oembed_time_' . $key_suffix; /** * Filters the oEmbed TTL value (time to live). * * @since 4.0.0 * * @param int $time Time to live (in seconds). * @param string $url The attempted embed URL. * @param array $attr An array of shortcode attributes. * @param int $post_id Post ID. */ $ttl = apply_filters( 'oembed_ttl', DAY_IN_SECONDS, $url, $attr, $post_id ); $cache = ''; $cache_time = 0; $cached_post_id = $this->find_oembed_post_id( $key_suffix ); if ( $post_id ) { $cache = get_post_meta( $post_id, $cachekey, true ); $cache_time = get_post_meta( $post_id, $cachekey_time, true ); if ( ! $cache_time ) { $cache_time = 0; } } elseif ( $cached_post_id ) { $cached_post = get_post( $cached_post_id ); $cache = $cached_post->post_content; $cache_time = strtotime( $cached_post->post_modified_gmt ); } $cached_recently = ( time() - $cache_time ) < $ttl; if ( $this->usecache || $cached_recently ) { // Failures are cached. Serve one if we're using the cache. if ( '{{unknown}}' === $cache ) { return $this->maybe_make_link( $url );Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-embed.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.