how can i search a lots of .js and .php files for a specific phrase?

Windows has a go at it but only gets a few when i seach a directory.

Is there an IDE or similar that allows for searching within the files of an entire directory?

for example, if I need to make sure no files require to a redundant class (old_class.php) I'd like to search for 'old_class.php'

or alternatively if anyone knows a w开发者_高级运维ay to do this in Aptana (my text editor of choice) that would be amazing...

Notepad++ can search through multiple files.

http://notepad-plus-plus.org/

Edit: Oh and it's free!

What you want is easy with Aptana : Doc: How to search with Aptana

Try Windows GREP.
It works like a charm for me.

Yes, Dreamweaver has amazing search capabilities for searching within folders. Very useful and used all the time. Obviously, it's not free. Would be happy to learn a way in Aptana

Nothing better than ack (better than grep)

Try Windows Grep...