Method '__toString' return type
__toString methods that do not return
Prior to PHP 7.4, this would lead to a fatal
E_RECOVERABLE_ERROR level error. In PHP 7.4, a fatal non-recoverable
ERROR is thrown. In PHP 8.0, the return value follows the standard PHP type semantics and will be coerced into a string if possible and if strict typing is disabled.
See __toString (php.net) for details.
PhpStorm 2023.3, Qodana for PHP 2023.3