PHP multi-thread internal multi-thread instance analysis-PHP source code

This article mainly introduces the internal multithreading of PHP multithreading. The example analyzes the usage skills of php multithreading and has some reference value, for more information, see the next article. This article mainly introduces the internal multithreading of PHP multithreading. The example analyzes the usage skills of php multithreading and has some reference value. For more information, see

This article analyzes the internal multithreading usage of PHP multithreading. Share it with you for your reference. The details are as follows:

 SetOptions ($ options) ;}// set the url list function setUrls ($ urls) {$ this-> urls = $ urls; return $ this ;} // set the option function setOptions ($ options) {$ options [CURLOPT_RETURNTRANSFER] = 1; if (isset ($ options ['http _ post']) {curl_setopt ($ ch, CURLOPT_POST, 1); curl_setopt ($ ch, CURLOPT_POSTFIELDS, $ options ['http _ post']); unset ($ options ['http _ post']);} if (! Isset ($ options [CURLOPT_USERAGENT]) {$ options [CURLOPT_USERAGENT] = 'mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1;) ';} if (! Isset ($ options [CURLOPT_FOLLOWLOCATION]) {$ options [CURLOPT_FOLLOWLOCATION] = 1;} if (! Isset ($ options [CURLOPT_HEADER]) {$ options [CURLOPT_HEADER] = 0 ;}$ this-> options = $ options ;}// capture all content in parallel function exec () {if (empty ($ this-> urls) |! Is_array ($ this-> urls) {return false;} $ curl = $ data = array (); $ mh = curl_multi_init (); foreach ($ this-> urls as $ k => $ v) {$ curl [$ k] = $ this-> addHandle ($ mh, $ v );} $ this-> execMulitHandle ($ mh); foreach ($ this-> urls as $ k => $ v) {$ data [$ k] = curl_multi_getcontent ($ curl [$ k]); curl_multi_remove_handle ($ mh, $ curl [$ k]);} curl_multi_close ($ mh ); return $ data;} // capture the content of only one webpage. Function execOne ($ url) {if (empty ($ url) {return false;} $ ch = curl_init ($ url); $ this-> setOneOption ($ ch ); $ content = curl_exec ($ ch); curl_close ($ ch); return $ content;} // Internal function, set the private function setOneOption ($ ch) option of a handle) {curl_setopt_array ($ ch, $ this-> options);} // add a new parallel handle private function addHandle ($ mh, $ url) {$ ch = curl_init ($ url); $ this-> setOneOption ($ ch); curl_multi_add_han Dle ($ mh, $ ch); return $ ch;} // parallel execution (this is a common mistake. I still use this method here, this write method // downloading a small file may cause 100% of CPU usage, and this loop will run more than 0.1 million times. // This is a typical error caused by ignorance of the principle. This error is quite common in official PHP documents .) Private function execMulitHandle ($ mh) {$ running = null; do {curl_multi_exec ($ mh, $ running) ;}while ($ running> 0 );}} /* The following is an example of the test of the above class: */$ urls = array (" http://baidu.com "," http://baidu.com "," http://baidu.com "," http://baidu.com "," http://baidu.com "," http://baidu.com "," http://www.google.com "," http://www.sina.com.cn ",); $ M = new Http_MultiRequest (); $ t = microtime (true); $ m-> setUrls ($ urls); // parallel fetch (parallel capture ): $ data = $ m-> exec (); $ parallel_time = microtime (true)-$ t; echo $ parallel_time. "\ n"; $ t = microtime (true); // serial fetch (serial capture): foreach ($ urls as $ url) {$ data [] = $ m-> execOne ($ url);} $ serial_time = microtime (true)-$ t; echo $ serial_time. "\ n ";

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