Fixing the implements interface for string

[mamazu]

The problem

The implementation for the implementsInterface only works if the first argument is an object If not then it returns implementsInterface always returns false according to the plugin.

The proposed solution

This is my first attempt in fixing it by adding a get_class for the string and see what happens.

The build is currently not working but I know why.

[mamazu]

@ondrejmirtes Could you review this please?

[ondrejmirtes]

Hi, I have no idea how this could work because PHPStan does not have any dynamic return type extension for class_implements.

[mamazu]

Then we need to remove it entirely. Because the current implementation does not reflect what webmozart's function does.

[ondrejmirtes]

No, we just need to find a different fix.

[mamazu]

What do you think of. Currently I have a project that can't use the most recent version of the package because of this bug. I only see two possible options:

Either exclude the case string, string from being checked and just check for classes and strings. Or do something along the lines of trying to check if the class strings. Do match, however this is probably not possible as one of the values is probably resolved at runtime. So it would be as effective as not checking it at all.

[ondrejmirtes]

It's solvable but I current have other priorities, like getting PHPStan 0.12 out the door. If you learn how TypeSpecifier extensions work, you can also come up with it.