Ticket #21120: map_meta_cap.patch

wp-includes/capabilities.php

@@ -933 +933 @@
  *
  * @param string $cap Capability name.
  * @param int $user_id User ID.
+ * @param bool $cache Cache the results
  * @return array Actual capabilities for meta capability.
  */
-function map_meta_cap( $cap, $user_id ) {
+function map_meta_cap( $cap, $user_id, $cache = true ) {
+        static $_cache = array();
+        if ( $cache && isset( $_cache[ $cap.$user_id ] ) )
+                return $_cache[ $cap.$user_id ];
+
         $args = array_slice( func_get_args(), 2 );
         $caps = array();
 
@@ -1194 +1199 @@
                 $post_type_meta_caps = _post_type_meta_capabilities();
                 if ( isset( $post_type_meta_caps[ $cap ] ) ) {
                         $args = array_merge( array( $post_type_meta_caps[ $cap ], $user_id ), $args );
-                        return call_user_func_array( 'map_meta_cap', $args );
+                        $_cache[ $cap.$user_id ] = call_user_func_array( 'map_meta_cap', $args );
+                        return $_cache[ $cap.$user_id ];
                 }
 
                 // If no meta caps match, return the original cap.
                 $caps[] = $cap;
         }
 
-        return apply_filters('map_meta_cap', $caps, $cap, $user_id, $args);
+        $_cache[ $cap.$user_id ] = apply_filters('map_meta_cap', $caps, $cap, $user_id, $args);
+        return $_cache[ $cap.$user_id ];
 }
 
 /**