Ticket #14429: faster-is_serialized.diff

wp-includes/functions.php

@@ -232 +232 @@
         if ( !is_string( $data ) )
                 return false;
         $data = trim( $data );
+        if ( empty($data) )
+                return false;
         if ( 'N;' == $data )
                 return true;
-        if ( !preg_match( '/^([adObis]):/', $data, $badions ) )
+        if ( ':' !== substr( $data, 1, 1 ) )
                 return false;
-        switch ( $badions[1] ) {
+        $badion = substr( $data, 0, 1 );
+        if ( !in_array( $badion, array( 'a', 'd', 'O', 'b', 'i', 's' ) ) )
+                return false;
+        switch ( $badion ) {
                 case 'a' :
                 case 'O' :
                 case 's' :
-                        if ( preg_match( "/^{$badions[1]}:[0-9]+:.*[;}]\$/s", $data ) )
+                        if ( preg_match( "/^{$badion}:[0-9]+:.*[;}]\$/s", $data ) )
                                 return true;
                         break;
                 case 'b' :
                 case 'i' :
                 case 'd' :
-                        if ( preg_match( "/^{$badions[1]}:[0-9.E-]+;\$/", $data ) )
+                        if ( preg_match( "/^{$badion}:[0-9.E-]+;\$/", $data ) )
                                 return true;
                         break;
         }