PHP解压缩zip文件

    function unzip_file($file, $destination) {  
        // create object  
        $zip = new ZipArchive() ;  
        // open archive  
        if ($zip->open($file) !== TRUE) {  
            die ('Could not open archive');  
        }  
        // extract contents to destination directory  
        $zip->extractTo($destination);  
        // close archive  
        $zip->close();  
        echo 'Archive extracted to directory';  
    }