Online PHP editor | output for nnBaG

<?php declare(strict_types=1); interface ValidatorInterface { public function validate($number); } interface LegacyValidatorInterface { public function validate($number, $deprecated = false); } class Validator implements LegacyValidatorInterface, ValidatorInterface { public function validate($number, $deprecated = false) { echo func_num_args(); echo "\n"; } } class Decorator implements ValidatorInterface { /** * @var ValidatorInterface */ private $core; /** * @param ValidatorInterface $core */ public function __construct(ValidatorInterface $core) { $this->core = $core; } public function validate($number) { $this->core->validate($number); } } $v = new Decorator(new Validator()); $v->validate("1", false); $v->validate("1");