Well for one: If coded right a PHP file is secure, it's server side.
For 2: It doesn't matter where you put the images, they can be downloaded.
I'm talking about disabling right clicking, which is useless. FireFox can get around it anyway, and if you found a way for firefox to not get around it, then w.e it's just going to piss users off. There's no reason to not have right clicking. If you can find *1* GOOD reason why to have it disabled, which you won't, then maybe I'll believe it's a good idea. But there aren't any good reasons.
Image stealing is easy with right click disabled, image placed in a wierd folder with a wierd name. Ever heard of PRINT SCREEN?
Regards,