Feature request: ability to filter out entire directories/folders

I would like to suggest a new feature: ability to exclude php files from 
entire folders. This is useful when we have limited RAM on the host machine 
and would then like to exclude the admin panels for the CMS or blogging 
software installed on the system. At the moment the filtering parameter only 
looks at the file name and ignores the folder or the full path - hence there 
is no real way to achieve this setup.

I hope this is posted in the right place, otherwise let me know where and I 
appologize.

Thank you!
-Ron Peled