Wrote a quick tool to do some source code auditting, you'll need to modify it if you want it to work for files other than PHP files. It is fast and builds a filelist only once to save searching time, each time you do a search, it creates a text file with the results and opens it with your default text editor (on Windows atleast, didn't test it on Linux yet).

Usage is as simple as copying the file to the directory where you want to audit, the script will index all files in all subdirectories recursively. Open it and simply type in a regex (without the slashes).

Download link: click here