巧用curl 并发减少后端访问时间
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2022-05-19 11:13:42
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转载自:http://www.phpskill.com/html/show-1-4403-1.html php经验分享交流群:323899029,这里面有更多精彩文章 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50
转载自:http://www.phpskill.com/html/show-1-4403-1.html
php经验分享交流群:323899029,这里面有更多精彩文章
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, PHP
1、老的curl访问方式以及耗时统计 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}"; ?> 耗时:0.614秒
2、curl并发访问方式以及耗时统计 $url) { $timeout=2; $ch[$nch] = curl_init(); curl_setopt_array($ch[$nch], array( CURLOPT_URL => $url, CURLOPT_HEADER => false, CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => $timeout, )); curl_multi_add_handle($mh, $ch[$nch]); ++$nch; } /* wait for performing request */ do { $mrc = curl_multi_exec($mh, $running); } while (CURLM_CALL_MULTI_PERFORM == $mrc); while ($running && $mrc == CURLM_OK) { // wait for network if (curl_multi_select($mh, 0.5) > -1) { // pull in new data; do { $mrc = curl_multi_exec($mh, $running); } while (CURLM_CALL_MULTI_PERFORM == $mrc); } } if ($mrc != CURLM_OK) { error_log("CURL Data Error"); } /* get data */ $nch = 0; foreach ($urlarr as $moudle=>$node) { 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}"; ?>
耗时:0.316秒 帅气吧整个页面访问后端接口的时间节省了一半 php经验分享交流群:323899029,这里面有更多精彩文章 3、curl相关参数 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 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 转载自:http://www.phpskill.com/html/show-1-4403-1.html php经验分享交流群:323899029,这里面有更多精彩文章