class CurlMultiUtil {
/**
* 根據(jù)url,postData獲取curl請(qǐng)求對(duì)象,這個(gè)比較簡(jiǎn)單,可以看官方文檔
*/
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){
$downloader = curl_multi_init();
// 將三個(gè)待請(qǐng)求對(duì)象放入下載器中
foreach ($chList as $ch){
curl_multi_add_handle($downloader,$ch);
}
$res = array();
// 輪詢(xún)
do {
while (($execrun = curl_multi_exec($downloader, $running)) == CURLM_CALL_MULTI_PERFORM);
if ($execrun != CURLM_OK) {
break;
}
// 一旦有一個(gè)請(qǐng)求完成,找出來(lái),處理,因?yàn)閏url底層是select,所以最大受限于1024
while ($done = curl_multi_info_read($downloader)){
// 從請(qǐng)求中獲取信息、內(nèi)容、錯(cuò)誤
// $info = curl_getinfo($done['handle']);
$output = curl_multi_getcontent($done['handle']);
// $error = curl_error($done['handle']);
$res[] = $output;
// 把請(qǐng)求已經(jīng)完成了得 curl handle 刪除
curl_multi_remove_handle($downloader, $done['handle']);
}
// 當(dāng)沒(méi)有數(shù)據(jù)的時(shí)候進(jìn)行堵塞,把 CPU 使用權(quán)交出來(lái),避免上面 do 死循環(huán)空跑數(shù)據(jù)導(dǎo)致 CPU 100%
if ($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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