Example of how PHP implements concurrent requests using Curl_multi

This article mainly introduces the implementation of PHP using CURL_MULTI implementation of Concurrent request Method Example, has a certain reference value, now share to everyone, the need for friends can refer to

The examples in this article describe how PHP implements concurrent requests using Curl_multi. Share to everyone for your reference, as follows:

Class Curlmultiutil {/** * Gets the Curl Request object according to Url,postdata, this is relatively simple, you can see the official document */private static function Getcurlobject ($url, $pos    Tdata=array (), $header =array ()) {$options = array ();    $url = Trim ($url);    $options [Curlopt_url] = $url;    $options [Curlopt_timeout] = 3;    $options [Curlopt_returntransfer] = true;    foreach ($header as $key = = $value) {$options [$key] = $value;      } if (!empty ($postData) && Is_array ($postData)) {$options [curlopt_post] = true;    $options [Curlopt_postfields] = Http_build_query ($postData);    } if (Stripos ($url, ' https ') = = = 0) {$options [curlopt_ssl_verifypeer] = false;    } $ch = Curl_init ();    Curl_setopt_array ($ch, $options);  return $ch; }/** * [request description] * @param [type] $chList * @return [Type] */private static function request ($chLis    T) {$downloader = Curl_multi_init ();    Put three requested objects into the downloader foreach ($chList as $ch) {Curl_multi_add_handle ($downloader, $ch);    } $res = Array ();  Polling  Do {while ($execrun = Curl_multi_exec ($downloader, $running)) = = = Curlm_call_multi_perform);      if ($execrun! = CURLM_OK) {break; }//Once a request has been completed, find out, handle, because curl is the bottom layer is select, so the maximum is limited by the 1024x768 while ($done = Curl_multi_info_read ($downloader)) {//From        Request for information, content, error//$info = Curl_getinfo ($done [' handle ']);        $output = curl_multi_getcontent ($done [' handle ']);        $error = Curl_error ($done [' handle ']);        $res [] = $output;      The request has been completed Curl handle Delete curl_multi_remove_handle ($downloader, $done [' handle ']); }//When there is no data to jam, the use of the CPU to hand out, to avoid the above do dead loop empty data caused by the CPU 100% if ($running) {$rel = Curl_multi_select ($downl        Oader, 1);        if ($rel = =-1) {usleep (1000);      }} if ($running = = false) {break;    }}while (True);    Curl_multi_close ($downloader);  return $res; }/** * [get description] * @param [type] $URLARR * @return [Type] */public static function get ($URLARR) {   $data = Array ();      if (!empty ($URLARR)) {$chList = array ();      foreach ($urlArr as $key = + $url) {$chList [] = Self::getcurlobject ($url);    } $data = Self::request ($chList);  } return $data; }}