检查删除图片

//检查图片删除图片
    public function checkDelImage($id = 0, $url = '')
    {
        if ($id) {
            $zxinfo = $this->info($id);
            if ($zxinfo['thumb'] != $url) {
                unlink(dirname(__FILE__) . "/../../../public/" . $zxinfo['thumb']);
            }
        }
        return 1;
    }