Online PHP editor | output for uFTB1

<?php class Context { private static $_context = []; public static function get($dependency) { return isset(self::$_context[$dependency]) ? self::$_context[$dependency] : null; } public static function register($dependencies) { if (!is_array($dependencies)) { throw new Exception("Неверное значение параметра для добавления зависимости в контекст"); } foreach ($dependencies as $key => $value) { self::$_context[$key] = $value; } } } Context::register([ "test" => function() { return "callback"; } ]); echo Context::get("test");