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<?php interface LifeCycleListener { function before(); function after(); } class LifeCycler { private $listeners = []; public function run(callable $x) { foreach ($this->listeners as $l) $l->before(); $x(); foreach ($this->listeners as $l) $l->after(); } public function addListener(LifeCycleListener $listener) { $this->listeners[] = $listener; } } $lc = new LifeCycler(); $lc->addListener(new class implements LifeCycleListener { function before() { echo "before!\n"; } function after() { echo "after!\n"; } }); $lc->run(function() { echo "running!\n"; });
Output for git.master, git.master_jit, rfc.property-hooks
before! running! after!

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