How can I browse through my PHP code in Aptana? [duplicate]

Question

This question already has an answer here:

Aptana 3 php can't activate function linking and variable assist (1 answer)

Closed 8 years ago.

When I was developing Java with Eclipse in the old days, I remember that I could click on each method and Class which brought me to the according place, where that specific method is defined. Even in third party libraries.

Now in Aptana, I can only click on and browse to my PHP class method names that exist in the very current file I am working in. But I cannot click on any Class name or method that exists externally in other files.

Is this a not yet implemented (or even not yet planned) feature of Aptana? Or can I simply activate extensive browsing to external files as well?

Sidenote: I am always working with FQDNs.

Answer 1

Project Nature wasn't set to PHP for this project. I changed it according this answer:

1. Right-click on the project in the Project Explorer View.
2. Choose Properties > Project Natures.
3. Select PHP nature.
4. Confirm and re-open project.