I have checked out articles and tutorials.

I don't know what to do about the security of my picture upload-folder.

It is pictures for classifieds which should be uploaded to the folder.

This is what I want:

 Anybody may upload images to the folder.
 The images will be moved to another folder, by another php-code later on (automatic).
 Only I may manually remove them, as well as another php file on the server which automatically empties the folder after x-days.

What should I do here?

The images are uploaded via a php-upload script. This script checks to see if the extension of the file is actually a valid image-file.

When I try this:

   chmod 755 images

the images wont be uploaded.

But like this it works:

   chmod 777 images

But 777 is a security risk right?

Please give me detailed information...

The Q is, what to do to solve this problem, not info about what permissions there are etc etc...

Thanks

If you need more info let me know...