Media: Introduce the `enclosure_links` filter, which makes it possible to adjust the list of audio and video enclosure links derived from post content before querying the database.

Props niallkennedy, stevenkword.
Fixes #19890.

Built from https://develop.svn.wordpress.org/trunk@35288


git-svn-id: http://core.svn.wordpress.org/trunk@35254 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/functions.php

@@ -537,6 +537,19 @@ function do_enclose( $content, $post_ID ) {
 		}
 	}
 
+	/**
+	 * Filter the list of enclosure links before querying the database.
+	 *
+	 * Allows for the addition and/or removal of potential enclosures to save
+	 * to postmeta before checking the database for existing enclosures.
+	 *
+	 * @since 4.4.0
+	 *
+	 * @param array $post_links An array of enclosure links.
+	 * @param int   $post_ID    Post ID.
+	 */
+	$post_links = apply_filters( 'enclosure_links', $post_links, $post_ID );
+
 	foreach ( (array) $post_links as $url ) {
 		if ( $url != '' && !$wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE %s", $post_ID, $wpdb->esc_like( $url ) . '%' ) ) ) {
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-35287';
+$wp_version = '4.4-alpha-35288';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.