is_a: if third argument is false then do not allow string in first argument

[eigan]

Feature request

https://www.php.net/manual/en/function.is-a.php

If this parameter set to false, string class name as object is not allowed.

PHPStan could report that a string is sent in this case:
https://phpstan.org/r/44b40ab5-7c7f-4ced-8048-e084d3d63f1d

[staabm]

we had the same issue today: https://phpstan.org/r/a797fd58-43c7-4db3-a4b9-b6fb892627c9

will put this issue on my todo list

[rvanvelzen]

Adding a conditional parameter in stubs should work (same for is_subclass_of):

/**
 * @param ($allow_string is true ? object|string : object) $object_or_class
 */
function is_a(mixed $object_or_class, string $class, bool $allow_string = false): bool {}

[staabm]

it sounds too good to be true. need to try that immediately :-)

[ondrejmirtes]

Implemented: phpstan/phpstan-src#1311

[github-actions]

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