<?php

/**

 * 1个请求      耗时 0.19000s,  平均每个耗时:0.19000s

 * 10个请求     耗时 1.60000s,  平均每个耗时:0.16000s

 * 100个请求    耗时 14.92400s, 平均每个耗时:0.14924s

 * 1000个请求   超时

 *

 */

    set_time_limit(0);

    $time = microtime(true);

    echo '<pre>开始时间' . date('Y-m-d H:i:s', time()) . '<br>';

    $data = $res =[];

    $count  = 1000;

    for ($i=0; $i <$count ; $i++) {

        $url = 'https://suggest.taobao.com/sug?code=utf-8&q=%E5%8D%AB%E8%A1%A3&callback=cb';

        $res[] = curl_request($url);

    }

    function curl_request($url, $post='', $cookie='', $returnCookie=0)

    {

        $curl = curl_init();

        curl_setopt($curl, CURLOPT_URL, $url);

        curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)');

        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);

        curl_setopt($curl, CURLOPT_AUTOREFERER, 1);

        curl_setopt($curl, CURLOPT_REFERER, "http://XXX");

        //关闭SSL验证

        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);

        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);

        if($post) {

            curl_setopt($curl, CURLOPT_POST, 1);

            curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($post));

        } else {

            //curl_setopt($curl, CURLOPT_POST, 1); //使用后大概快了20%, 但是这个是post请求的

        }

        if($cookie) {

            curl_setopt($curl, CURLOPT_COOKIE, $cookie);

        }

        curl_setopt($curl, CURLOPT_HEADER, $returnCookie);

        curl_setopt($curl, CURLOPT_TIMEOUT, 10);

        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

        $data = curl_exec($curl);

        if (curl_errno($curl)) {

            return curl_error($curl);

        }

        curl_close($curl);

        if($returnCookie){

            list($header, $body) = explode("\r\n\r\n", $data, 2);

            preg_match_all("/Set\-Cookie:([^;]*);/", $header, $matches);

            $info['cookie']  = substr($matches[1][0], 1);

            $info['content'] = $body;

            return $info;

        }else{

            return $data;

        }

    }

    $cost = microtime(true) - $time;

    echo "结束时间" .  date('Y-m-d H:i:s', time()) . ', 耗时 '. sprintf('%.5f', $cost) . 's, 平均每个耗时:' . sprintf('%.5f', $cost / $count) . 's <br>';

    var_dump($res);

<?php

/**

 * 1个请求      耗时 0.16300s   平均每个耗时:0.16300s

 * 10个请求     耗时 0.33500s   平均每个耗时:0.03350s

 * 100个请求    耗时 1.62600s,  平均每个耗时:0.01626s

 * 1000个请求   耗时 22.27700s, 平均每个耗时:0.02228s

 *

 */

$time = microtime(true);

echo '<pre>开始时间' . date('Y-m-d H:i:s', time()) . '<br>';

set_time_limit(0);

$data = [];

$count = 1000;

for ($i=0; $i <$count ; $i++) {

    $url = 'https://suggest.taobao.com/sug?code=utf-8&q=%E5%8D%AB%E8%A1%A3&callback=cb';

    $data[]['url'] = $url;

}

function getMultiCurlResult($data = [], $timeout = 120)

{

    $request = [];

    $requestResource = curl_multi_init();

    foreach ($data as $k => $v) {

        $option = [

            CURLOPT_TIMEOUT => $timeout,//请求超时时间,防止死循环

            CURLOPT_RETURNTRANSFER => true,//获取的信息以文件流的形式返回，而不是直接输出。

        ];

        if (!isset($v['url']) || !$v['url']) return null;

        $option[CURLOPT_URL] = trim($v['url']);

        if (stripos($v['url'], 'https') === 0) $option[CURLOPT_SSL_VERIFYPEER] = false;

        if (isset($v['data'])) {//如果设置了请求参数,则是POST请求

            $option[CURLOPT_POST] = true;

            $option[CURLOPT_POSTFIELDS] = http_build_query($v['data']);

        }

        //启动一个curl会话

        $request[$k] = curl_init();

        //设置请求选项

        curl_setopt_array($request[$k], $option);

        //添加请求句柄

        curl_multi_add_handle($requestResource, $request[$k]);

    }

    $running = null;

    $result = [];

    do {//执行批处理句柄

        //CURLOPT_RETURNTRANSFER如果为0,这里会直接输出获取到的内容.如果为1,后面可以用curl_multi_getcontent获取内容.

        curl_multi_exec($requestResource, $running);

        //阻塞直到cURL批处理连接中有活动连接,不加这个会导致CPU负载超过90%.

        curl_multi_select($requestResource);

    } while ($running > 0);

    foreach ($request as $k => $v) {

        $result[$k] = curl_multi_getcontent($v);

        curl_multi_remove_handle($requestResource, $v);

    }

    curl_multi_close($requestResource);

    return $result;

}

$res = getMultiCurlResult($data);

$cost = microtime(true) - $time;

echo "结束时间" .  date('Y-m-d H:i:s', time()) . ', 耗时 '. sprintf('%.5f', $cost) . 's, 平均每个耗时:' . sprintf('%.5f', $cost / $count) . 's <br>';

var_dump($res);