Example of how PHP uses curl_multi to implement concurrent requests-PHP Tutorial-php.cn

Example of how PHP uses curl_multi to implement concurrent requests

不言

Release： 2023-03-25 08:04:02

Original

1861 people have browsed it

This article mainly introduces examples of how to use curl_multi to implement concurrent requests in PHP. It has a certain reference value. Now I share it with you. Friends in need can refer to it.

The examples in this article describe PHP Use curl_multi to implement concurrent requests. Share it with everyone for your reference, the details are as follows:

class CurlMultiUtil {
  /**
  * 根据url,postData获取curl请求对象,这个比较简单,可以看官方文档
  */
  private static function getCurlObject($url,$postData=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,&#39;https&#39;) === 0){
      $options[CURLOPT_SSL_VERIFYPEER] = false;
    }
    $ch = curl_init();
    curl_setopt_array($ch,$options);
    return $ch;
  }
  /**
   * [request description]
   * @param [type] $chList
   * @return [type]
   */
  private static function request($chList){
    $downloader = curl_multi_init();
    // 将三个待请求对象放入下载器中
    foreach ($chList as $ch){
      curl_multi_add_handle($downloader,$ch);
    }
    $res = array();
    // 轮询
    do {
      while (($execrun = curl_multi_exec($downloader, $running)) == CURLM_CALL_MULTI_PERFORM);
      if ($execrun != CURLM_OK) {
        break;
      }
      // 一旦有一个请求完成，找出来，处理,因为curl底层是select，所以最大受限于1024
      while ($done = curl_multi_info_read($downloader)){
        // 从请求中获取信息、内容、错误
        // $info = curl_getinfo($done[&#39;handle&#39;]);
        $output = curl_multi_getcontent($done[&#39;handle&#39;]);
        // $error = curl_error($done[&#39;handle&#39;]);
        $res[] = $output;
        // 把请求已经完成了得 curl handle 删除
        curl_multi_remove_handle($downloader, $done[&#39;handle&#39;]);
      }
      // 当没有数据的时候进行堵塞，把 CPU 使用权交出来，避免上面 do 死循环空跑数据导致 CPU 100%
      if ($running) {
        $rel = curl_multi_select($downloader, 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;
  }
}

Copy after login

Related recommendations:

PHP uses file_get_contents to send http request function is simple

Analysis of how PHP uses new StdClass() to create an empty object

Example of PHP using Curl to implement simulated login and data capture functions

The above is the detailed content of Example of how PHP uses curl_multi to implement concurrent requests. For more information, please follow other related articles on the PHP Chinese website!