本文实例讲述了php使用curl并发减少后端访问时间的方法。分享给大家供大家参考，具体如下：在我们平时的程序中难免出现同时访问几个接口的情况，平时我们用curl进行访问的时候，一般都是单个、顺序访问，假如有3个接口，每个接口耗时500毫 秒那么我们三个接口就要花费1500毫秒了，这个问题太头疼了严重影响了页面访问速度，有没有可能并发访问来提高速度呢？今天就简单的说一下，利用 curl并发来提高页面访问速度，1、老的curl访问方式以及耗时统计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 - $time_start; echo "耗时:{$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 - $time_start; echo "耗时:{$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更多关于PHP相关内容感兴趣的读者可查看本站专题：《php curl用法总结》、《PHP数组(Array)操作技巧大全》、《PHP数据结构与算法教程》、《PHP数学运算技巧总结》、《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》希望本文所述对大家PHP程序设计有所帮助。PHP教程
