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Small abstraction on top of pcntl_signal to allow to register multiple callables for a single signal.

Installation

composer require innmind/signals

Usage

use Innmind\Signals\{
 Handler,
 Signal,
 Info,
};

$handler = Handler::main(); // automatically enable async signal on first `->listen()` call

$handler
 ->listen(Signal::interrupt, function(Signal $signal, Info $info): void {
 echo 'foo';
 })
 ->unwrap();
$handler
 ->listen(Signal::interrupt, function(Signal $signal, Info $info): void {
 echo 'bar';
 })
 ->unwrap();

// do some logic here

When above script is executed in a terminal and you do a ctrl + c to stop the process it will print foobar instead of stopping the script.

If for some reason you need to remove a handler (for example when a child process ended) you can call $handler->remove($listener)->unwrap() (remove the listener for all signals).