向进程发送信号
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向进程发送信号
int swoole_process::kill($pid, $signo = SIGTERM);
此方法类似于posix_kill http://php.net/manual/zh/function.posix-kill.php
子进程退出后，父进程务必要执行swoole_process::wait进行回收，否则这个子进程就会变为僵尸进程。会浪费操作系统的进程资源。
父进程可以设置监听SIGCHLD信号，收到信号后执行swoole_process::wait回收退出的子进程。
<?php $process = new swoole_process('callback_function', true); //子进程执行的逻辑 function callback_function(swoole_process $worker) { swoole_timer_tick(2000,function(){ echo time(); }) } $pid = $process->start(); //父进程执行的逻辑 //监听子进程退出信号 swoole_process::signal(SIGCHLD, function($sig) { //必须为false，非阻塞模式 while($ret = swoole_process::wait(false)) { //执行回收后的处理逻辑，比如拉起一个新的进程 } });