Ticket #37458: 37458.diff

wp-includes/general-template.php

@@ -2814 +2814 @@
         /** This filter is documented in wp-includes/formatting.php */
         $hints['dns-prefetch'][] = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2/svg/' );
 
+        /**
+         * Filters domains and URLs for resource hints.
+         *
+         * @since 4.6.0
+         *
+         * @param array $hints An array of relation types URLs to print for resource hints.
+         */
+        $hints = apply_filters( 'wp_resource_hints', $hints );
+
         foreach ( $hints as $relation_type => $urls ) {
                 /**
-                 * Filters domains and URLs for resource hints.
+                 * Filters domains and URLs for resource hints of relation type.
                  *
+                 * The dynamic portion of the hook name, `$relation_type`, refers to the
+                 * relation type the URLs are printed for. Can be 'dns-prefetch', 'preconnect',
+                 * 'prefetch', or 'prerender'.
+                 *
                  * @since 4.6.0
                  *
                  * @param array  $urls          URLs to print for resource hints.
-                 * @param string $relation_type The relation type the URLs are printed for, e.g. 'preconnect' or 'prerender'.
+                 * @param string $relation_type The relation type the URLs are printed for.
                  */
-                $urls = apply_filters( 'wp_resource_hints', $urls, $relation_type );
+                $urls = apply_filters( "wp_resource_hints_{$relation_type}", $urls, $relation_type );
 
                 foreach ( $urls as $key => $url ) {
                         $url = esc_url( $url, array( 'http', 'https' ) );