dreamweaver has an option to automatically scan a directory and index all the user defined functions so you can then easily reference and auto complete when writing code. I am using notepad++ to right PHP and would like a similar feature without the need of manually updating an API or config file or anything for notepad++.
Does anyone know of a plugin/addon etc or maybe a better open source program which allows this feature?
Did you try Sublime Text 2? It’s a really cool text editor, that implements natively what are you asking for.