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/**
 +-----------------------------------------------------------------------------
 * 检查代理ip信息有效性
 +-----------------------------------------------------------------------------
 * @param string $proxy_ip [117.95.100.126:8998]
 * @param int $times 执行检查次数
 * @return array
 * @author elinx <[email protected]> 2016-07-29
 +-----------------------------------------------------------------------------
 */
function check_proxy_ip_info($proxy_ip=false,$times=10) {
    $header = array(
        // "GET / HTTP/1.1",// "HOST: www.baidu.com","accept: application/json","accept-encoding: gzip,deflate","accept-language: en-US,en;q=0.8","content-type: application/json","user-agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/51.0.2704.106 Safari/537.36",);
    $url = 'http://www.baidu.com/';
    $result['succeed_times'] = 0; //成功次数
    $result['defeat_times']  = 0; //失败次数
    $result['total_spen']    = 0; //总用时
    for ($i=0; $i < $times; $i++) { 
        $s = microtime();
        $curl = curl_init();
        curl_setopt($curl,CURLOPT_URL,$url); //设置传输的url
        curl_setopt($curl,CURLOPT_HTTPHEADER,$header); //发送http报头
        curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
        curl_setopt($curl,CURLOPT_ENCODING,'gzip,deflate'); // 解码压缩文件
        curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,false); //不验证证SSL书
        curl_setopt($curl,CURLOPT_SSL_VERIFYHOST,false); //不验证SSL证书

        if (@$proxy_ip != false) { //使用代理ip
            curl_setopt($curl,array (
                'Client_Ip: '.mt_rand(0,255).'.'.mt_rand(0,255),));
            curl_setopt($curl,array (
                'X-Forwarded-For: '.mt_rand(0,CURLOPT_PROXYTYPE,CURLPROXY_HTTP);
            curl_setopt($curl,CURLOPT_PROXY,$proxy_ip);
        }

        curl_setopt($curl,CURLOPT_COOKIEFILE,dirname(__FILE__).'/cookie.txt');
        curl_setopt($curl,CURLOPT_COOKIEJAR,CURLOPT_TIMEOUT,30); // 设置超时限制防止死循环
        // $response_header = curl_getinfo($curl); // 获取返回response报头
        $content = curl_exec($curl);
        if (strstr($content,'百度一下，你就知道')) {
            $result['list'][$i]['status'] = 1;
            $result['succeed_times'] += 1;
        } else {
            $result['list'][$i]['status'] = 0;
            $result['defeat_times']  += 1;
        }
        $e = microtime();
        $result['total_spen']          += abs($e-$s);
        $result['list'][$i]['spen']    =  abs($e-$s);
        $result['list'][$i]['content'] =  json_encode($content,true);
        // $result['list'][$i]['response_header'] =  $response_header;
    }
    $result['precent'] = (number_format($result['succeed_times']/$times,4)*100).'%';
    $result['average_spen'] = number_format($result['total_spen']/$times,4);
    return $result;
}

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