How to implement daemon process in PHP

This article mainly introduces how PHP uses processes as daemons. It analyzes the implementation techniques of daemons in PHP with examples. It has certain reference value. Friends in need can refer to the following

Examples of this article PHP's way of treating a process as a daemon. 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

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

So let The way for a process to become a daemon is:

1 fork out a child process

2 in the child process posix_setsid()

3 exit the parent process

There is such 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 <= 60; $i++) {//do something for 5 minutes
      sleep(5);
    }
  }
?>

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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