Is there a plugin for Notepad++ which would allow me to see functions including parameters/returns as I type?
For example, if i type \"implode(\", I\'d see:
maybe, plugin Auto completion for custom PHP classes (ACCPC) is what you're mean.
basic info:
Show an overview over your classes' attributes & methods in a nice popup!
A popup window appears after typing the "->"
or "::"
behind a class or an instantiated object variable which displays all attributes and methods of it's class.
more information:
http://sourceforge.net/projects/accpc/
maybe this answer can helpful too:
Get parameter hints from Editing the API XML file
https://stackoverflow.com/a/12609240/2427906