Ticket #2871: 2871.diff

src/includes/core/template-functions.php

@@ -314 +314 @@
         // Add 'bbp_template_stack' to the current filter array
         $wp_current_filter[] = $tag;
 
-        // Bail if no stack setup
-        if ( empty( $wp_filter[ $tag ] ) ) {
-                return array();
-        }
+        if ( class_exists( 'WP_Hook' ) ) {
+                $filter = $wp_filter[ $tag ]->callbacks;
+        } else {
+                $filter = &$wp_filter[ $tag ];
 
-        // Sort
-        if ( ! isset( $merged_filters[ $tag ] ) ) {
-                ksort( $wp_filter[ $tag ] );
-                $merged_filters[ $tag ] = true;
+                // Sort
+                if ( ! isset( $merged_filters[ $tag ] ) ) {
+                        ksort( $filter );
+                        $merged_filters[ $tag ] = true;
+                }
         }
 
         // Ensure we're always at the beginning of the filter array
-        reset( $wp_filter[ $tag ] );
+        reset( $filter );
 
         // Loop through 'bbp_template_stack' filters, and call callback functions
         do {
-                foreach ( (array) current( $wp_filter[ $tag ] ) as $the_ ) {
+                foreach ( (array) current( $filter ) as $the_ ) {
                         if ( ! is_null( $the_['function'] ) ) {
                                 $args[1] = $stack;
                                 $stack[] = call_user_func_array( $the_['function'], array_slice( $args, 1, (int) $the_['accepted_args'] ) );
                         }
                 }
-        } while ( next( $wp_filter[ $tag ] ) !== false );
+        } while ( next( $filter ) !== false );
 
         // Remove 'bbp_template_stack' from the current filter array
         array_pop( $wp_current_filter );