simple_deamon_example.php

<?php
declare(ticks = 1);

echo "simple daemon\n"; 



// tick use required as of PHP 4.3.0

// signal handler function
function sig_handler($signo)
{

     switch ($signo) {
         case SIGTERM:
             echo "Cleaning up\n";
             echo "Done,exiting\n";
             // handle shutdown tasks
             exit;
             break;
         case SIGHUP:
             echo "Reloading configuration\n";
             // handle restart tasks
             break;
         case SIGUSR1:
             echo "Caught SIGUSR1...\n";
             echo "I can do whatever i want with sigusr\n";
             break;
         default:
             // handle all other signals
     }

}

echo "Installing signal handler...\n";

// setup signal handlers
pcntl_signal(SIGTERM, "sig_handler");
pcntl_signal(SIGHUP,  "sig_handler");
pcntl_signal(SIGUSR1, "sig_handler");



$pid = pcntl_fork(); 

if ($pid == 0 ) { 
    echo "I'm in the child!\n";
    while(true) { 
        sleep(5);
        echo "I'm still running...\n";
    }
}
else {
   echo "child pid is $pid, exiting\n";
   die();
}