pcntl-php-example-1

  • Examples

    • Basic usage

  • Basic usage

    • Basic usage

    Basic usage

    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
             }

    }

    ?>