本文實例講述了php使用curl并發減少后端訪問時間的方法。分享給大家供大家參考，具體如下：在我們平時的程序中難免出現同時訪問幾個接口的情況，平時我們用curl進行訪問的時候，一般都是單個、順序訪問，假如有3個接口，每個接口耗時500毫 秒那么我們三個接口就要花費1500毫秒了，這個問題太頭疼了嚴重影響了頁面訪問速度，有沒有可能并發訪問來提高速度呢？今天就簡單的說一下，利用 curl并發來提高頁面訪問速度，1、老的curl訪問方式以及耗時統計function curl_fetch($url, $timeout=3){ $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_TIMEOUT, $timeout); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $data = curl_exec($ch); $errno = curl_errno($ch); if ($errno 0) { $data = false; curl_close($ch); return $data;function microtime_float() list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec);$url_arr=array( "taobao"= "http://www.taobao.com", "sohu"= "http://www.sohu.com", "sina"= "http://www.sina.com.cn", $time_start = microtime_float(); $data=array(); foreach ($url_arr as $key= $val) $data[$key]=curl_fetch($val); $time_end = microtime_float(); $time = $time_end - $time_start; echo "耗時:{$time}"; if (($err = curl_error($ch[$nch])) == '') { $res[$nch]=curl_multi_getcontent($ch[$nch]); $result[$moudle]=$res[$nch]; else error_log("curl error"); curl_multi_remove_handle($mh,$ch[$nch]); curl_close($ch[$nch]); ++$nch; curl_multi_close($mh); return $result;$url_arr=array( "taobao"= "http://www.taobao.com", "sohu"= "http://www.sohu.com", "sina"= "http://www.sina.com.cn",function microtime_float() list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec);$time_start = microtime_float();$data=curl_multi_fetch($url_arr);$time_end = microtime_float();$time = $time_end - $time_start; echo "耗時:{$time}"; curl_close — Close a cURL session curl_copy_handle — Copy a cURL handle along with all of its preferences curl_errno — Return the last error number curl_error — Return a string containing the last error for the html' target='_blank'>current session curl_exec — Perform a cURL session curl_getinfo — Get information regarding a specific transfer curl_init — Initialize a cURL session curl_multi_add_handle — Add a normal cURL handle to a cURL multi handle curl_multi_close — Close a set of cURL handles curl_multi_exec — Run the sub-connections of the current cURL handle curl_multi_getcontent — Return the content of a cURL handle if CURLOPT_RETURNTRANSFER is set curl_multi_info_read — Get information about the current transfers curl_multi_init — Returns a new cURL multi handle curl_multi_remove_handle — Remove a multi handle from a set of cURL handles curl_multi_select — Wait for activity on any curl_multi connection curl_setopt_array — Set multiple options for a cURL transfer curl_setopt — Set an option for a cURL transfer curl_version — Gets cURL version information更多關于PHP相關內容感興趣的讀者可查看本站專題：《php curl用法總結》、《PHP數組(Array)操作技巧大全》、《PHP數據結構與算法教程》、《PHP數學運算技巧總結》、《php日期與時間用法總結》、《php面向對象程序設計入門教程》、《php字符串(string)用法總結》、《php+mysql數據庫操作入門教程》及《php常見數據庫操作技巧匯總》希望本文所述對大家PHP程序設計有所幫助。PHP教程
