PHP _php techniques as a way to daemon processes

The example in this article describes how PHP processes a process as a daemon. Share to everyone for your reference. The specific analysis is as follows:

Usage of posix_setsid () in PHP

The document explanation is "make the current process a session leader"

Reference Document: Http://linux.die.net/man/2/setsid

This means that the process of calling this function between a group of processes (parent and child processes) will be elected as a leader of the process group

So the way to make a process a daemon is to:

1 Fork out a child process

2 in the subprocess Posix_setsid ()

3 Exiting the parent process

There is an example in the document:

<?php
  $pid = Pcntl_fork ();//Fork
  if ($pid < 0)
    exit;
  else if ($pid)//parent
    exit;
  else {//child
    $sid = Posix_setsid ();
    if ($sid < 0)
      exit;
    for ($i = 0; $i <= $i + +) {//do Something for 5 minutes sleep
      (5);
    }
? >

I hope this article will help you with your PHP program design.