Tell if class implements an interface

[NotionCommotion]

Both of these approaches work, however, I am surprised that there isn't a more direct approach.  is_a doesn't appear to work with interfaces and instanceof doesn't work with class names.  Is there a more proper way of doing so?  If not, is one of my  two approaches better than the other (I am assuming the in_array approach is more performant and is more intuitive at least to me).  Thanks

 

    private function classImplementsInterface1(string $class, string $interface):bool
    {
        return in_array($interface, class_implements($class));
    }
    private function classImplementsInterface2(string $class, string $interface):bool
    {
        return (new \ReflectionClass($class))->implementsInterface($interface);
    }

 

[requinix]

is_subclass_of, which continues the tradition of some things using the word "class" to represent interfaces too.

[NotionCommotion]

Thanks, Was going to say "the docs for is_a should list this under see other" but just looked again and see it is already there.