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<?php declare(strict_types=1); trait ControlHelper { public const CONTROL_TEST = 'test'; public function getControl(string $name = self::CONTROL_TEST): void { } } abstract class BasePresenter { use ControlHelper; } class Presenter extends BasePresenter { } $method = new ReflectionMethod(Presenter::class, 'getControl'); foreach ($method->getParameters() as $param) { $tmp = $param->getDefaultValue(); var_dump($tmp); }
Output for 8.2.21 - 8.2.29, 8.3.5 - 8.3.27, 8.4.1 - 8.4.14
string(4) "test"
Output for 8.1.30 - 8.1.33
Fatal error: Traits cannot have constants in /in/ZQ6EC on line 5
Process exited with code 255.

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