Ticket #22271: 22271_2a.patch

wp-includes/post-template.php

@@ -318 +318 @@
 
         $classes = array();
 
+        if ( !empty($class) ) {
+                if ( !is_array( $class ) )
+                        $classes = preg_split('#\s+#', $class);
+        }
+
         if ( empty($post) )
-                return $classes;
+                return array_map( 'esc_attr', $classes );
 
         $classes[] = 'post-' . $post->ID;
         if ( ! is_admin() )
@@ -366 +371 @@
                 }
         }
 
-        if ( !empty($class) ) {
-                if ( !is_array( $class ) )
-                        $class = preg_split('#\s+#', $class);
-                $classes = array_merge($classes, $class);
-        }
-
         $classes = array_map('esc_attr', $classes);
 
         return apply_filters('post_class', $classes, $class, $post->ID);