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<?php class Signal { protected $listeners; function add($callback) { $this->listeners[]=$callback; } function dispatch() { if (empty($this->listeners)) { return; } $args = func_get_args(); $numArgs = func_num_args(); foreach ($this->listeners as $callback) { switch ($numArgs) { case 0: call_user_func($callback); break; case 1: call_user_func($callback, $args[0]); break; case 2: call_user_func($callback, $args[0], $args[1]); break; default: call_user_func_array($callback, $args); } } } } function myListener() { $args = func_get_args(); print_r($args); } $signal = new Signal(); $signal->add('myListener'); $signal->add('myListener'); $signal->dispatch('a'); $signal->dispatch('a',456); $signal->dispatch('a',456,array(123));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => a ) Array ( [0] => a ) Array ( [0] => a [1] => 456 ) Array ( [0] => a [1] => 456 ) Array ( [0] => a [1] => 456 [2] => Array ( [0] => 123 ) ) Array ( [0] => a [1] => 456 [2] => Array ( [0] => 123 ) )

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