Ticket #22355: 22355.5.patch

wp-includes/template.php

@@ -502 +502 @@
  */
 function locate_template($template_names, $load = false, $require_once = true ) {
         $located = '';
+        $locations = array(
+                get_stylesheet_directory(),
+                get_template_directory()
+        );
+
+        /**
+         * Filter the possible template locations.
+         *
+         * @since unknown
+         *
+         * @param array $locations Possible template locations.
+         */
+        $locations = apply_filters( 'template_locations', $locations );
+
         foreach ( (array) $template_names as $template_name ) {
                 if ( !$template_name )
                         continue;
-                if ( file_exists(STYLESHEETPATH . '/' . $template_name)) {
-                        $located = STYLESHEETPATH . '/' . $template_name;
-                        break;
-                } elseif ( file_exists(TEMPLATEPATH . '/' . $template_name) ) {
-                        $located = TEMPLATEPATH . '/' . $template_name;
-                        break;
+
+                foreach ( (array) $locations as $location ) {
+                        $template_name = trailingslashit( $location ) . $template_name;
+                        if ( file_exists( $template_name ) {
+                                $located = $template_name;
+                                break 2;
+                        }
                 }
         }