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<?php declare(strict_types = 1); class HelloWorld { use Help; public function sayHello(DateTimeImutable $date): void { $this->attachTag(); } } trait Help { public function attachTag( string $type = self::class ): void { var_dump($type); } } $hw = new HelloWorld(); $hw->attachTag();
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
string(10) "HelloWorld"

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