Ticket #23202: 23202.patch

wp-includes/post-template.php

@@ -1244 +1244 @@
  * @return bool False on failure, true if success.
  */
 function is_page_template( $template = '' ) {
-        if ( ! is_page() )
+        if ( ! is_page() && ! in_the_loop() ) {
                 return false;
+        } elseif ( in_the_loop() ) {
+                global $wp_the_query;
+                $page_template = get_page_template_slug( $wp_the_query->queried_object_id );
+        }
+        else {
+                $page_template = get_page_template_slug( get_queried_object_id() );
+        }
 
-        $page_template = get_page_template_slug( get_queried_object_id() );
-
         if ( empty( $template ) )
                 return (bool) $page_template;