PHP/WebStorm and Unity 3D Follow

Hi guys,

Does anyone know if there's a way to use PHPStorm with Unity 3D? Obviously I could use it as a completely separate editor without doing anything special, but it would be really useful to have access to the Unity classes/keywords in the IDE, especially since a lot of it is different to regular JS.

Is this possible, and if so how would I go about doing it? All suggestions appreciated!

Tom