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Predefined Constants	PCNTL Functions

	Last updated: Thu, 26 Jun 2008

Examples

This example forks off a daemon process with a signal handler.

Example #1 Process Control Example


<?php

declare(ticks=1);



$pid = pcntl_fork();

if ($pid == -1) {

     die("could not fork"); 

} else if ($pid) {

     exit(); // we are the parent 

} else {

     // we are the child

}



// detatch from the controlling terminal

if (posix_setsid() == -1) {

    die("could not detach from terminal");

}



// setup signal handlers

pcntl_signal(SIGTERM, "sig_handler");

pcntl_signal(SIGHUP, "sig_handler");



// loop forever performing tasks

while (1) {



    // do something interesting here



}



function sig_handler($signo) 

{



     switch ($signo) {

         case SIGTERM:

             // handle shutdown tasks

             exit;

             break;

         case SIGHUP:

             // handle restart tasks

             break;

         default:

             // handle all other signals

     }



}



?>

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Predefined Constants	PCNTL Functions

	Last updated: Thu, 26 Jun 2008

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