How to enable autocomplete/syntax-highlight for PHP core functions in Eclipse?

Question

I searched a lot, checked many times the neccesary steps, but it still don\'t work.

My environment is :

1. Latest eclipse for PHP developer package

Answer 1

For me, nothing worked, except:

1. Backup and then delete the .db files under: /.metadata/.plugins/org.eclipse.dltk.core.index.sql.h2/
2. Restart eclipse.

I got this tip from #4 in: http://www.nwiresoftware.com/blogs/nwire/2010/09/five-tips-speeding-eclipse-pdt-and-nwire