innmind/signals

Manage multiple callbacks per signal

4.1.1 2025-08-20 12:30 UTC

Requires

• php: ~8.2
• innmind/immutable: ~5.18

Requires (Dev)

• innmind/black-box: ~6.5
• innmind/coding-standard: ~2.0
• innmind/static-analysis: ^1.2.1

MIT

• Baptiste Langlade

• cli
• signal
• handler

README

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

// 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) (remove the listener for all signals).