I used Netbeans only for a small small J2ME project, so I know little about its work. But in the PHP editor I use Codelobster PHP Edition, there is a tab to the left of the page where you can have different views, such as the project view (all folders and the file of the current project in the form of a tree), file view (divided by resource type: vars, functions, interfaces, ...), as well as a class representation, which shows the entire method of all classes within your project, sorted alphabetically. I don’t know if you understand something like this, in case you can try it, it's free.