PhpStorm теперь полностью поддерживает PHP 8.3
https://blog.jetbrains.com/phpstorm/2023/11/phpstorm-now-supports-php-8-3/
The JetBrains Blog
PhpStorm Now Supports PHP 8.3 | The PhpStorm Blog
PhpStorm Now Supports PHP 8.3 | The PhpStorm Blog
PhpStorm now provides full support for PHP 8.3 feature: the new `#[Override]` attribute and `json_validate()` function, and more!