Ticket #16471: 16471.patch

wp-includes/query.php

@@ -19 +19 @@
  * @uses $wp_query
  *
  * @param string $var The variable key to retrieve.
+ * @param mixed $default Optional. The default value if variable does not exists.
  * @return mixed
  */
-function get_query_var($var) {
+function get_query_var($var, $default='') {
         global $wp_query;
 
-        return $wp_query->get($var);
+        return $wp_query->get($var, $default);
 }
 
 
@@ -1834 +1835 @@
          * @access public
          *
          * @param string $query_var Query variable key.
+         * @param mixed (optional) The default value if variabled does not exists.
          * @return mixed
          */
-        function get($query_var) {
+        function get($query_var, $default='') {         
                 if ( isset($this->query_vars[$query_var]) )
                         return $this->query_vars[$query_var];
 
-                return '';
+                return $default;
         }
 
         /**