pcntl_signal_dispatch

<?

function handler($signo, $siginfo)
{
    print_r($siginfo);
}

$signal = SIGHUP;
$handler = "handler";

pcntl_signal($signal, $handler);

$process_id = posix_getpid();

posix_kill($process_id, $signal);

$return = pcntl_signal_dispatch();

var_export($return);

Array
(
    [signo] => 1
    [errno] => 0
    [code] => 0
)
true