I'm trying to set a longer (30 day) 'expires' header for my (images only) in the /misc-stuff/ directory.

This is what I'm using for my site :

# Serve static files directly from nginx
location ~* \.(jpg|jpeg|gif|png|bmp|ico|pdf|flv|swf|exe|html|htm|txt|css|js) {
   add_header        Cache-Control public;
   add_header        Cache-Control must-revalidate;
   expires           7d;
}

I want to be able to keep that code in to handle regular site images, but create a new block to handle the /misc-stuff/ directory.

I have tried :

location ^~ /misc-stuff/ {
...
}

The problem I'm having now is that my backup .php files in that directory show up as plain text if someone tries to access it.

How do I set it up so ONLY .gif images in the /misc-stuff/ directory are effected?