A standalone middleware library without dependencies inspired by middleware in Laravel (Illuminate/Pipeline).
I have written a small blog post about the library and how to use it: Implementing before/after middleware in PHP
composer require optimus/onion ~1.0class BeforeLayer implements LayerInterface { public function peel($object, Closure $next) { $object->runs[] = 'before'; return $next($object); } } class AfterLayer implements LayerInterface { public function peel($object, Closure $next) { $response = $next($object); $object->runs[] = 'after'; return $response; } } $object = new StdClass; $object->runs = []; $onion = new Onion; $end = $onion->layer([ new AfterLayer(), new BeforeLayer(), new AfterLayer(), new BeforeLayer() ]) ->peel($object, function($object){ $object->runs[] = 'core'; return $object; }); var_dump($end);Will output
..object(stdClass)#161 (1) { ["runs"]=> array(5) { [0]=> string(6) "before" [1]=> string(6) "before" [2]=> string(4) "core" [3]=> string(5) "after" [4]=> string(5) "after" } }