Online PHP editor | output for EJJ1f

<?php date_default_timezone_set('America/New_York'); class Block { private $start; private $end; private $callback; public function __construct($start, $end, callable $callback) { $this->start = $start; $this->end = $end; $this->callback = $callback; } public function check($time) { return $time > strtotime($this->start) && $time > strtotime($this->end); } public function invoke() { call_user_func($this->callback); } } $blocks = [ new Block('16:00:00', '18:00:00', function () { echo 'Foo!' }), new Block('18:00:00', '20:00:00', function () { echo 'Bar!' }), new Block('20:00:00', '22:00:00', function () { echo 'Qux!' }), ]; while (true) { foreach ($blocks as $block) { if ($block->check()) { $block->invoke(); } } sleep(1); }