php curl_multi 多线程查询的例子

$t=getTime();
$total=10;
for($i=0;$i  $url_arr[] = "http://www.111cn.net /test";
}
   
$mh = curl_multi_init();
foreach ($url_arr as $i => $url) {
 $conn[$i] = curl_init($url);
 curl_setopt($conn[$i],CURLOPT_RETURNTRANSFER,1); // 设置返回页面输出内容
 curl_multi_add_handle ($mh,$conn[$i]); // 添加线程
}
#----------------执行线程----------------
do {
 $mrc = curl_multi_exec($mh,$active);
}while ($mrc == CURLM_CALL_MULTI_PERFORM);

while ($active and $mrc == CURLM_OK) {
 if (curl_multi_select($mh) != -1) {
  do {
   $mrc = curl_multi_exec($mh, $active);
  } while ($mrc == CURLM_CALL_MULTI_PERFORM);
 }
}

foreach ($url_arr as $i => $url) {
 $res[$i]=curl_multi_getcontent($conn[$i]);//得到页面输入内容
 curl_multi_remove_handle($mh, $conn[$i]);
 curl_close($conn[$i]);
}
curl_multi_close($mh);

foreach($res as $k=>$v){
 $k=str_pad($k,2,0);
 echo "$k => $v
";
}

runTime($t);
#----------- calculate time function-------------
function getTime(){
 $TIME=explode(" ",microtime());
 $TIME=$TIME[1].substr($TIME[0],1);
 return $TIME;
}
function runTime($t,$l=3){
 $dif=getTime()-$t;
 echo ' '.number_format($dif,$l);
}
?>