Signals

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).