Ticket #20942: gmt-date-matches.diff

wp-includes/formatting.php

@@ -1865 +1865 @@
  */
 function get_gmt_from_date($string, $format = 'Y-m-d H:i:s') {
         preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches);
+        
+        if ( ! $matches )
+                return null;
+        
         $tz = get_option('timezone_string');
         if ( $tz ) {
                 date_default_timezone_set( $tz );