instanceof equivalent for a string-represented classname

Using the Reflection API, you can construct a ReflectionClass object using the name of the class as well as an object.

Try is_subclass_of(). It can accept both parameters as strings. http://php.net/manual/en/function.is-subclass-of.php

Looks like this is my answer: is_subclass_of

It can accept both parameters as strings

http://php.net/manual/en/function.is-subclass-of.php