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<?php class Foo{ public function __call($method, $args) { if(is_callable(array($this, $method))) { return call_user_func_array($this->$method, $args); } // else throw exception } } $foo = new Foo; $foo->cb = function($who) { return "Hello $who"; }; echo $foo->cb('World');
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Creation of dynamic property Foo::$cb is deprecated in /in/fTa8R on line 13 Hello World

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