[8.6] Add clamp function

[kylekatarnls]

RFC: https://wiki.php.net/rfc/clamp_v2
Original implementation: php/php-src#19434
Documentation: php/doc-en#4814

[nicolas-grekas]

That would be for PHP 8.6, isn't it?

[kylekatarnls]

That would be for PHP 8.6, isn't it?

Correct, moving it.

[kylekatarnls]

php/php-src#19434 is merged (will land in PHP 8.6)

[Ayesh]

Added a very minor nitpick.

[kylekatarnls]

Hello @fabpot @nicolas-grekas, do you need anything else for this?

[lyrixx]

Failures seems related:

e 2 errors:

1) Symfony\Polyfill\Tests\Php86\Php86Test::testClamp
TypeError: Argument 1 passed to Symfony\Polyfill\Tests\Php86\clamp() must be an instance of Symfony\Polyfill\Tests\Php86\mixed, integer given, called in /home/runner/work/polyfill/polyfill/tests/Php86/Php86Test.php on line 20

/home/runner/work/polyfill/polyfill/tests/Php86/Php86Test.php:20

2) Symfony\Polyfill\Tests\Php86\Php86Test::testClamp
TypeError: Polyfills enabled, Argument 1 passed to Symfony\Polyfill\Tests\Php86\clamp() must be an instance of Symfony\Polyfill\Tests\Php86\mixed, integer given, called in /home/runner/work/polyfill/polyfill/tests/Php86/Php86Test.php on line 20

/home/runner/work/polyfill/polyfill/tests/Php86/Php86Test.php:20

[nicolas-grekas]

Thank you @kylekatarnls.