Bug report

PHPStan detects an error where there is none as the signature seems to be based on the first example from https://www.php.net/manual/en/function.uopz-flags.php, where as the second one is also valid. ('' for class flags)

Code snippet that reproduces the problem

https://phpstan.org/r/d8a163b2-a3dc-4b6e-987d-b593449e1c87

Expected output

No error

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