It is some time necessary to make a PHP progam as a daemon .Here it explains how it is possible. Process Control support in PHP implements the Unix style of process creation, program execution, signal handling and process termination. Process Control should not be enabled within a web server environment and unexpected results may happen if any Process Control functions are used within a web server environment.

The process control functions come along with the php-cli in linux.So we don’t need to install extra libraries for this to work.If php-cli is not there in your machine intall it with yum or apt-get.As i am using the ubuntu os im explaining with its command Ubuntu users can follow this.

bipin@bipin-laptop:~$ sudo apt-get install php5-cli

Copy and paste the code for background process

<?php
include_once('createdb.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");
}
$posid=posix_getpid();
$fp = fopen("/var/run/process.pid", "w");
fwrite($fp, $posid);
fclose($fp);
// setup signal handlers
 pcntl_signal(SIGTERM, "sig_handler");
 pcntl_signal(SIGHUP, "sig_handler");
// loop forever performing tasks
 $dbobject = new DB();
 $dbobject->getCon();
 while (1) {
// do something interesting here, here i have called a function from other flile called "createdb.php"
$dbobject->CopyCallFiles();
}
 fclose($fp);
 function sig_handler($signo)
 {
switch ($signo) {
 case SIGTERM:
 // handle shutdown tasks
 exit;
 break;
 case SIGHUP:
 // handle restart tasks
 break;
 default:
 // handle all other signals
 }
}
?>

Run the program and the function $dbobject->CopyCallFiles(); will work as a deamon here we can include a file instead of the function also here.