PHP多进程实现
php有一组进程控制函数(编译时需要–enable-pcntl与posix扩展)，使得php能在nginx系统中实现跟c一样的创建子进程、使用exec函数执行程序、处理信号等功能。
CentOS 6 下yum安装php的，默认是不安装pcntl的，因此需要单独编译安装，首先下载对应版本的php，解压后
- cd php-version/ext/pcntl
- phpize
- ./configure && make && make install
- cp /usr/lib/php/modules/pcntl.so /usr/lib64/php/modules/pcntl.so
- echo "extension=pcntl.so" >> /etc/php.ini
- /etc/init.d/httpd restart
方便极了。
下面是示例代码：
- <?php
- header(‘content-type:text/html;charset=utf-8‘ );
-
- if (!function_exists("pcntl_fork")) {
- die("pcntl extention is must !");
- }
- $totals = 3;
- $cmdArr = array();
- for ($i = 0; $i < $totals; $i++) {
- $cmdArr[] = array("path" => __DIR__ . "/run.php", ‘pid‘ =>$i ,‘total‘ =>$totals);
- }
-
-
- pcntl_signal(SIGCHLD, SIG_IGN);
- foreach ($cmdArr as $cmd) {
- $pid = pcntl_fork();
-
- if ($pid == -1) {
-
- die(‘could not fork‘);
- } else if ($pid) {
-
-
- pcntl_wait($status,WNOHANG);
- } else {
-
- $path = $cmd["path"];
- $pid = $cmd[‘pid‘] ;
- $total = $cmd[‘total‘] ;
- echo exec("/usr/bin/php {$path} {$pid} {$total}")."\n";
- exit(0) ;
- }
- }
- ?>
PHP多进程实现
原文：http://www.cnblogs.com/ghjbk/p/7039708.html
