PHP 多进程实践（3）-PHP Tutorial-php.cn

PHP 多进程实践（3）

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Release： 2016-06-13 11:10:37

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PHP 多进程实践（三）

5. windows多线程

windows系统不支持pcntl函数，幸好有curl_multi_exec()这个工具，利用内部的多线程，访问多个链接，每个链接可以作为一个任务。

编写脚本 test1.php

<?phpdate_default_timezone_set ( 'Asia/Chongqing');$tasks = array(     'http://localhost/feedbowl/t2.php?job=task1',     'http://localhost/feedbowl/t2.php?job=task2',     'http://localhost/feedbowl/t2.php?job=task3');$mh = curl_multi_init();foreach ($tasks as $i => $task){     $ch[$i] = curl_init();     curl_setopt($ch[$i], CURLOPT_URL, $task);     curl_setopt($ch[$i], CURLOPT_RETURNTRANSFER, 1);     curl_multi_add_handle($mh, $ch[$i]);}do {$mrc = curl_multi_exec($mh,$active); } while ($mrc == CURLM_CALL_MULTI_PERFORM);while ($active && $mrc == CURLM_OK) {     if (curl_multi_select($mh) != -1) {       do {$mrc = curl_multi_exec($mh, $active); } while ($mrc == CURLM_CALL_MULTI_PERFORM);     }}// completed, checkout resultforeach ($tasks as $j => $task){     if (curl_error($ch[$j])){          echo "task ${j} [$task ] error " , curl_error($ch[$j]), "\r\n" ;     } else {          echo "task ${j} [$task ] get: \r\n" , curl_multi_getcontent($ch[$j]), "\r\n" ;     }}?>

Copy after login

编写脚本 test2.php

<?phpdate_default_timezone_set ( 'Asia/Chongqing');echo "child start, pid ", getmypid(), "\r\n" ;for ($i=0; $i<5; ++$i){     beep();}exit (0);// ***function beep(){    echo getmypid(), "\t" , date('Y-m-d H:i:s' , time()), "\r\n";    sleep(1);}?>

Copy after login

用命令行运行

#php -f test1.php &

输出结果

task 0 [http://localhost/feedbowl/t2.php?job=task1] get:
child start, pid 5804
5804    2013-01-15 20:22:35
5804    2013-01-15 20:22:36
5804    2013-01-15 20:22:37
5804    2013-01-15 20:22:38
5804    2013-01-15 20:22:39

task 1 [http://localhost/feedbowl/t2.php?job=task2] get:
child start, pid 5804
5804    2013-01-15 20:22:35
5804    2013-01-15 20:22:36
5804    2013-01-15 20:22:37
5804    2013-01-15 20:22:38
5804    2013-01-15 20:22:39

task 2 [http://localhost/feedbowl/t2.php?job=task3] get:
child start, pid 5804
5804    2013-01-15 20:22:35
5804    2013-01-15 20:22:36
5804    2013-01-15 20:22:37
5804    2013-01-15 20:22:38
5804    2013-01-15 20:22:39

从打印的时间看到，多个任务几乎是同时运行的。