1.2.1569. ext/pcntl

Extension for process control.

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.

<?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
     }

}

?>

See also Process Control.

1.2.1569.1. Specs

Short name	Extensions/Extpcntl
Rulesets	All, Appinfo, CE, Changed Behavior
Exakat since	0.8.4
PHP Version	All
Severity
Time To Fix
Precision	Very high
Available in	Entreprise Edition, Community Edition, Exakat Cloud