Making Eclipse view different file extensions as PHP

Question

I have several file extensions, like .module, that I would like to be understood by Eclipse to be PHP - so I get the same syntax highlighting, code completion,

Answer 1

Something extra to be aware of.

I had the same problem, even after installing PDT. Turns out that there was an entry in General=>Content Types=>Text for *.php. Note that this not under General=>Content Types=>Text=>PHP Content Type, which is placed there by PDT. Removing the one under Text fixed the problem for me.