PHP uses a process as a daemon

PHP uses a process as a daemon

This article mainly introduces how PHP uses the process as the daemon process. The example analyzes the implementation skills of the daemon process in php and has some reference value. If you need it, refer

 

 

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:

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<? 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.