Enhance FILTER_VALIDATE_INT option in filter_var

[takeokunn]

fixed phpstan/phpstan#7608

[takeokunn]

@ondrejmirtes I don't know how to fix failure github actions job.
Could you mind help me?

[herndlm]

@takeokunn it looks like the problem is that e.g. octdec returns only int before PHP 8. At least that's the type phpstan currently resolves. Such cases might be impossible to fix and have to go to a PHP version specific baseline most likely. There should be some existing already. Sorry, I'm typing from my half-broken phone :)

[zonuexe]

@herndlm
Thanks for your help! (I was working on pair programming with @takeokunn today)
Maybe the problem will be resolved after cherry-pick or rebase #1500.

[herndlm]

@zonuexe most likely it will, maybe double-check hexdec too. Sorry, still on my phone, otherwise I could have checked already

[zonuexe]

@herndlm
Of course, hexdec() is typed correctly

phpstan-src/resources/functionMap.php

Line 3933 in 07e341d

'hexdec' => ['int|float', 'hexadecimal_number'=>'string'],

[ondrejmirtes]

Thank you!