Ticket #26704: multiple-actions.patch

src/wp-includes/plugin.php

@@ -80 +80 @@
  * @return boolean true
  */
 function add_filter( $tag, $function_to_add, $priority = 10, $accepted_args = 1 ) {
+        $tag_a = explode(' ', $tag);
+        if (isset($tag_a[1])) { //Check if the array is longer than 1 element
+                foreach ($tag_a as $t) {
+                        add_filter($t, $function_to_add, $priority, $accepted_args);
+                }
+       return;
+        }
+        
         global $wp_filter, $merged_filters;
 
         $idx = _wp_filter_build_unique_id($tag, $function_to_add, $priority);