[Turn]curl_multi to implement a quasi-multi-process send request

From:http://blog.sina.com.cn/s/blog_515b90d00100jtnv.html

Curl_multi function Family:
Curl_multi_close
Curl_multi_exec
Curl_multi_getcontent
Curl_multi_add_handle
Curl_multi_info_read
Curl_multi_init
Curl_multi_remove_handle
Curl_multi_select

Usage steps:
First step: Call Curl_multi_init
Step two: Loop call Curl_multi_add_handle
It is important to note that the second parameter of Curl_multi_add_handle is a sub-handle from Curl_init.
Step three: Continue calling Curl_multi_exec
Fourth step: Loop call Curl_multi_getcontent as needed to get results
Fifth step: Call Curl_multi_remove_handle, and call curl_close for each word handle
Sixth step: Call Curl_multi_close

Let's look at my use in a small project:

   Public functionRequest ($requestdata,$kw)    {         $MH=Curl_multi_init (); $running=NULL; $user _agent= "mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) "; foreach($requestdata  as&$data)        {            $ch=Curl_init (); curl_setopt ($ch, Curlopt_url,$data[' URL ']); curl_setopt ($ch, Curlopt_header, 0); curl_setopt ($ch, Curlopt_returntransfer, 1); curl_setopt ($ch, Curlopt_useragent,$user _agent); curl_setopt ($ch, Curlopt_timeout, 100000); Curl_multi_add_handle ($MH,$ch); $data[' ch ']=$ch; $data[' Start ']=Microtime(1); }unset($data);  Do{             while(($execrun= Curl_multi_exec ($MH,$running)) ==curlm_call_multi_perform);  while($done= Curl_multi_info_read ($MH)) {                foreach($requestdata  as $data)                {                    if($data[' ch '] = = = =$done[' Handle ']) {                        $html= Curl_multi_getcontent ($done[' Handle ']); Call_user_func($data[' Callback '],$data[' URL '],$html,round((Microtime(1)-$data[' Start ']), 2),$kw); Curl_multi_remove_handle ($MH,$done[' Handle ']); }                }            }            if(!$running) Break;  while(($res= Curl_multi_select ($MH)) = = = 0); if($res===false) Break; } while(true); Curl_multi_close ($MH); }

[Turn]curl_multi to implement a quasi-multi-process send request