pcntl_signal() handler usage example

pcntl_signal_example.php

<?php
declare(ticks = 1);
 
pcntl_signal(SIGTERM, 'signalHandler'); // Termination ('kill' was called)
pcntl_signal(SIGHUP, 'signalHandler'); // Terminal log-out
pcntl_signal(SIGINT, 'signalHandler'); // Interrupted (Ctrl-C is pressed)

$seconds = 0;
$total = 10;

while ($seconds < $total) {
    sleep(1);
    $seconds++;
    echo sprintf('hi, %s seconds is left', $total - $seconds) . PHP_EOL;
};
 
function signalHandler($signal) {
    echo sprintf('ok, I\'m going with signal %s' . PHP_EOL, $signal);
    global $seconds;
    $seconds = 8;
}