php 使用 curl_multi 方法批量获取网页内容

<?php
/*
php 使用 curl_multi 方法批量获取网页内容
*/
function curl_multi_get($urls = array()){
    $mh = curl_multi_init();
    foreach ($urls as $i => $url) {
        $conn[$i] = curl_init($url);
        curl_setopt($conn[$i], CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)");
        curl_setopt($conn[$i], CURLOPT_HEADER ,0);
        curl_setopt($conn[$i], CURLOPT_CONNECTTIMEOUT,60);
        curl_setopt($conn[$i], CURLOPT_RETURNTRANSFER,true);
        curl_multi_add_handle ($mh,$conn[$i]);
    }
    do {
        curl_multi_exec($mh,$active);
    } while ($active);

    foreach ($urls as $i => $url) {
        $data[$i] = curl_multi_getcontent($conn[$i]);
        curl_multi_remove_handle($mh,$conn[$i]);
        curl_close($conn[$i]);
    }
    curl_multi_close($mh);
    return $data;
}

$urls=array();
$urls[]='http://www.baidu.com';
$urls[]='http://www.php100.com';
$urls[]='http://www.163.com/';
$data=curl_multi_get($urls);

var_dump($data);