Changeset 16300

Timestamp:

11/11/2010 04:10:16 PM (16 years ago)

Author:

ryan

Message:

Faster is_serialized(). Props duck_, hakre, Denis-de-Bernardy. see #14429

File:

• trunk/wp-includes/functions.php (modified) (1 diff)

trunk/wp-includes/functions.php

@@ -247 +247 @@
 function is_serialized( $data ) {
         // if it isn't a string, it isn't serialized
-        if ( !is_string( $data ) )
+        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();
-                        $badions[1] = $data[0];
-                } else {
-                        return false;
-                }
-        } elseif ( !preg_match( '/^([adObis]):/', $data, $badions ) ) {
+        $length = strlen( $data );
+        if ( $length < 4 )
                 return false;
-        }
-        switch ( $badions[1] ) {
+        if ( ':' !== $data[1] )
+                return false;
+        $lastc = $data[$length-1];
+        if ( ';' !== $lastc && '}' !== $lastc )
+                return false;
+        $token = $data[0];
+        switch ( $token ) {
+                case 's' :
+                        if ( '"' !== $data[$length-2] )
+                                return false;
                 case 'a' :
                 case 'O' :
-                case 's' :
-                        if ( preg_match( "/^{$badions[1]}:[0-9]+:.*[;}]\$/s", $data ) )
-                                return true;
-                        break;
+                        return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );
                 case 'b' :
                 case 'i' :
                 case 'd' :
-                        if ( preg_match( "/^{$badions[1]}:[0-9.E-]+;\$/", $data ) )
-                                return true;
-                        break;
+                        return (bool) preg_match( "/^{$token}:[0-9.E-]+;\$/", $data );
         }
         return false;