PHP 使用pcntl和libevent实现Timer功能

php 使用pcntl和libevent 实现timer功能<?php  function newchild($func_name) {      echo "enter newchild\n";      $args = func_get_args();      unset($args[0]);      $pid =  pcntl_fork();      if ($pid == 0) {          function_exists($func_name) and exit(call_user_func_array($func_name, $args)) or exit(-1);      } else if($pid == -1) {          echo "couldn't create child process";      } else {          return $pid;      }  }  （ps：^_^不错的php开发交流群：256271784，验证：csl，有兴趣的话可以加入进来一起讨论）function on_timer() {      echo "timer called\n";  }     /**  * @param $func string, function name  * @param $timeouts int, microtimes for time delay  */ function timer($func, $timeouts){         echo "enter timer\n";      $base = event_base_new();      $event = event_new();         event_set($event, 0, ev_timeout, $func);      event_base_set($event, $base);      event_add($event, $timeouts);         event_base_loop($base);  }     $pid = newchild("timer", "on_timer", 5000000);     if ($pid > 0) {      echo "master process exit\n";  }