Ticket #18007: 18007.4.patch

wp-includes/functions.php

@@ -245 +245 @@
  * @return bool False if not serialized and true if it was.
  */
 function is_serialized( $data ) {
+        static $is_overloaded;
+
+        if ( ! isset( $is_overloaded ) )
+                $is_overloaded = ( ( ini_get( 'mbstring.func_overload' ) & 2 ) != 0 ) && function_exists( 'mb_strlen' );
+
         // if it isn't a string, it isn't serialized
         if ( ! is_string( $data ) )
                 return false;
         $data = trim( $data );
         if ( 'N;' == $data )
                 return true;
-        $length = strlen( $data );
+        $length = ( $is_overloaded ) ? mb_strlen( $data, 'pass' ) : strlen( $data );
         if ( $length < 4 )
                 return false;
         if ( ':' !== $data[1] )
@@ -284 +289 @@
  * @return bool False if not a serialized string, true if it is.
  */
 function is_serialized_string( $data ) {
+        static $is_overloaded;
+
+        if ( ! isset( $is_overloaded ) )
+                $is_overloaded = ( ( ini_get( 'mbstring.func_overload' ) & 2 ) != 0 ) && function_exists( 'mb_strlen' );
+
         // if it isn't a string, it isn't a serialized string
         if ( !is_string( $data ) )
                 return false;
         $data = trim( $data );
-        $length = strlen( $data );
+        $length = ( $is_overloaded ) ? mb_strlen( $data, 'pass' ) : strlen( $data );
         if ( $length < 4 )
                 return false;
         elseif ( ':' !== $data[1] )