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Example of how PHP uses curl_multi to implement concurrent requests
Example of how PHP uses curl_multi to implement concurrent requests
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,'https') === 0){
$options[CURLOPT_SSL_VERIFYPEER] = false;
}
$ch = curl_init();
curl_setopt_array($ch,$options);
return $ch;
}
/**
* [request description]
* @param [type] $chList
* @return [type]
*/
private static function request($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['handle']);
$output = curl_multi_getcontent($done['handle']);
// $error = curl_error($done['handle']);
$res[] = $output;
// 把请求已经完成了得 curl handle 删除
curl_multi_remove_handle($downloader, $done['handle']);
}
// 当没有数据的时候进行堵塞，把 CPU 使用权交出来，避免上面 do 死循环空跑数据导致 CPU 100%
if ($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;
}
}
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