Php多进程实现代码

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 

<?php header('content-type:text/html;charset=utf-8' );  // 必须加载扩展 if (!function_exists("pcntl_fork")) {  die("pcntl extention is must !"); } //总进程的数量 $totals = 3; // 执行的脚本数量 $cmdArr = array(); // 执行的脚本数量的数组 for ($i = 0; $i < $totals; $i++) {  $cmdArr[] = array("path" => __DIR__ . "/run.php", 'pid' =>$i ,'total' =>$totals); }  /* 展开：$cmdArr Array (  [0] => Array  (   [path] => /var/www/html/company/pcntl/run.php   [pid] => 0   [total] => 3  )  [1] => Array  (   [path] => /var/www/html/company/pcntl/run.php   [pid] => 1   [total] => 3  )  [2] => Array  (   [path] => /var/www/html/company/pcntl/run.php   [pid] => 2   [total] => 3  ) ) */  pcntl_signal(SIGCHLD, SIG_IGN); //如果父进程不关心子进程什么时候结束,子进程结束后，内核会回收。 foreach ($cmdArr as $cmd) {  $pid = pcntl_fork(); //创建子进程  //父进程和子进程都会执行下面代码  if ($pid == -1) {  //错误处理：创建子进程失败时返回-1.  die('could not fork');  } else if ($pid) {  //父进程会得到子进程号，所以这里是父进程执行的逻辑  //如果不需要阻塞进程，而又想得到子进程的退出状态，则可以注释掉pcntl_wait($status)语句，或写成：  pcntl_wait($status,WNOHANG); //等待子进程中断，防止子进程成为僵尸进程。  } else {  //子进程得到的$pid为0, 所以这里是子进程执行的逻辑。  $path = $cmd["path"];  $pid = $cmd['pid'] ;  $total = $cmd['total'] ;  echo exec("/usr/bin/php {$path} {$pid} {$total}")."/n";  exit(0) ;  } } ?>