有没有高人教下，用php该如何抓包获取下面jlwzcn的值？

Question

想用来ip归属地查询接口但是url参数jlwzcn的值会一天更新一次，所以会接口会失效，所以想用php写一个获取数据包并获取jlwzcn的值的文件

Answer 1

/**
     * 获取IP信息
     * @param $ip
     * @return string
     */
    public function getIpInfo($ip = '119.29.145.222')
    {
        $url = "http://whois.pconline.com.cn/jsFunction.jsp?callback=jsShow&ip=" . $ip;
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        $output = curl_exec($ch);
        curl_close($ch);
        $info = iconv('GB2312', 'UTF-8', $output);
        preg_match_all("/[\x{4e00}-\x{9fa5}]+/u", $info, $regs);
        $ascription = join('', $regs[0]);
        return mb_substr($ascription, 0, 80, 'utf-8');
    }