PHP uses the process as the daemon.

PHP uses the process as the daemon.

This example describes how PHP uses a process as a daemon. Share it with you for your reference. The specific analysis is as follows:

Usage of posix_setsid () in php

The document explains "Make the current process a session leader"

Reference: http://linux.die.net/man/2/setsid

This means that the process that calls this function between a process group (parent process and child process) will be elected as the leader of the Process Group.

So the way to make a process a daemon is:

1 fork generates a sub-process

2 In the sub-process posix_setsid ()

3. Exit the parent process.

This document provides an example:

<? 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) ;}}?>

I hope this article will help you with php programming.