Ticket #29894: taxonomy.php.update3.diff

wp-includes/taxonomy.php

@@ -1555 +1555 @@
 
         $query = "SELECT $fields FROM $wpdb->terms AS t $join WHERE $where $orderby $order $limits";
 
+        // $args can be whatever, only use the args defined in defaults to compute the key
+        $filter_key = ( has_filter('list_terms_exclusions') ) ? serialize($GLOBALS['wp_filter']['list_terms_exclusions']) : '';
+        $key = md5( $query . $filter_key );
+        $last_changed = wp_cache_get( 'last_changed', 'terms' );
+        if ( ! $last_changed ) {
+                $last_changed = microtime();
+                wp_cache_set( 'last_changed', $last_changed, 'terms' );
+        }
+        $cache_key = "get_terms:$key:$last_changed";
+        $cache = wp_cache_get( $cache_key, 'terms' );
+        if ( false !== $cache ) {
+
+                /**
+                 * Filter the given taxonomy's terms cache.
+                 *
+                 * @since 2.3.0
+                 *
+                 * @param array        $cache      Cached array of terms for the given taxonomy.
+                 * @param string|array $taxonomies A taxonomy or array of taxonomies.
+                 * @param array        $args       An array of arguments to get terms.
+                 */
+                $cache = apply_filters( 'get_terms', $cache, $taxonomies, $args );
+                return $cache;
+        }
+
         if ( 'count' == $_fields ) {
                 $term_count = $wpdb->get_var($query);
                 return $term_count;