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<?php class Events { private $events = Array(); function __construct(){} function bind($eventName,Closure $callback) { if (!array_key_exists($eventName,$this->events)) { $this->events[$eventName] = $callback; } } function trig($eventName) { if(array_key_exists($eventName, $this->events)) { call_user_func($this->events[$eventName]); } } } function sayHello() { print("Hello world."); } $e = new Events; $e->bind('hello',sayHello()); sleep(15); $e->trig('hello');
Output for git.master, git.master_jit, rfc.property-hooks
Hello world. Fatal error: Uncaught TypeError: Events::bind(): Argument #2 ($callback) must be of type Closure, null given, called in /in/fCQcN on line 26 and defined in /in/fCQcN:7 Stack trace: #0 /in/fCQcN(26): Events->bind('hello', NULL) #1 {main} thrown in /in/fCQcN on line 7
Process exited with code 255.

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