php中foreach curl实现多线程例子

$sr=array(url_1,url_2,url_3);
foreach ($sr as $k=>$v) {
    $curlPost=$v.'?f=传入参数';
    $ch = curl_init($curlPost) ;
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true) ; // 获取数据返回
    curl_setopt($ch, CURLOPT_BINARYTRANSFER, true) ; // 在启用 CURLOPT_RETURNTRANSFER 时候将获取数据返回
    $data = curl_exec($ch) ;
    echo $k.&#39;##:&#39;.$data.&#39;<br>&#39;;
}
curl_close($ch);

<?php
multi_threads_request($nodes){
$mh = curl_multi_init();
$curl_array = array();
foreach($nodes as $i => $url)
{
$curl_array[$i] = curl_init($url);
curl_setopt($curl_array[$i], CURLOPT_RETURNTRANSFER, true);
curl_multi_add_handle($mh, $curl_array[$i]);
}
$running = NULL;
do {
usleep(10000);
curl_multi_exec($mh,$running);
} while($running > 0);
$res = array();
foreach($nodes as $i => $url)
{
$res[$url] = curl_multi_getcontent($curl_array[$i]);
}
foreach($nodes as $i => $url){
curl_multi_remove_handle($mh, $curl_array[$i]);
}
curl_multi_close($mh);
return $res;
}
print_r(multi_threads_request(array(
    &#39;http://www.phprm.com&#39;,
    &#39;http://qq.phprm.com&#39;,
));