Deploy script on fortrabbit with graceful shutdown

deploy.php

<?php

declare(ticks = 1);

// Your graceful shutdown handler
function exitGracefully($signal) {
	// do stuff, then end with exit code 0, so that the deploy can continue
	// or exit with non-zero code, so that the deploy aborts
	echo "Shutting down gracefully\n";
	exit(0);
}

// Set graceful shutdown handler 10 minutes, reduced by the time the
// graceful handler requires to shut down everything. So 9:30 min in
// this example:
pcntl_signal(SIGALRM, 'exitGracefully', true);
pcntl_alarm(60 * 10 - 30);

// Run your actual deploy script, simulated by a never-ending-loop
while (true) {
	echo "Running post deploy stuff..\n";
	sleep(1);
}