php实例分享之mysql数据备份(4)

// 写入文件
    public function writeFileByBackUpData($fileName, $data, $method="rb+", $iflock=1, $check=1, $chmod=1){
        $check && @strpos($fileName, '..')!==false && exit('Forbidden');
        @touch($fileName);
        $handle = @fopen($fileName, $method);
        if($iflock) {
            @flock($handle,LOCK_EX);
        }
        $fw = @fwrite($handle,$data);
        if($method == "rb+") ftruncate($handle, strlen($data));
        fclose($handle);
        $chmod && @chmod($fileName,0777);
        return $fw;
    }

/**
     * path: 生成压缩包的路径
     * fileName : 要压缩的文件名 通常和path 同一目录
     */
    public function createZipByBackUpFile($path) {
        $db_base_files = $this->getFileByBackUpDir($path);
        if(!empty($db_base_files)) {
            $zip = new ZipArchive;
            if($zip->open($path.$this->dbName.date('Ymd').'.zip', ZipArchive::CREATE | ZIPARCHIVE::OVERWRITE) !== true)
                die ("cannot open".$this->dbName.date('Ymd')."zip for writing.");
            foreach ($db_base_files as $key => $value) {
                if(is_file($value)) {
                    $file_name = basename($value);
                    $info[] = $zip->addFile($value, $file_name);// 避免压缩包里有文件的路径
                }
            }
            $zip->close();
            if(file_exists($path.$this->dbName.date('Ymd').'.zip'))
            foreach ($db_base_files as $val) {
                unlink($val);
            }
            if(count(array_filter($info)) > 0) return true;
        }
        return false;
    }