Ticket #14429: 14429-strpbrk.3.patch

wp-includes/functions.php

@@ -228 +228 @@
  * @return bool False if not serialized and true if it was.
  */
 function is_serialized( $data ) {
+        static $strpbrk_exists;
         // if it isn't a string, it isn't serialized
         if ( !is_string( $data ) )
                 return false;
         $data = trim( $data );
         if ( 'N;' == $data )
                 return true;
-        if ( function_exists('strpbrk') ) {
-                if ( strlen($data) > 1 && strpbrk($data,'adObis') == $data && $data[1] == ':' ) {
-                        $badions = array();
+        if ( strlen( $data ) < 4 )
+                return false;
+        isset( $strpbrk_exists ) || $strpbrk_exists = function_exists( 'strpbrk' );
+        if ( $strpbrk_exists ) {
+                if ( strpbrk( $data, 'adObis' ) === $data && ':' === $data[1] ) {
                         $badions[1] = $data[0];
                 } else {
                         return false;