Question

I have a dynamic resizing image script that gets the location of the image to be resized-on-the-fly from a GET variable.

How can I limit the script so that it ONLY works if a local image is passed?

Thanks!

Answer 1

Check if the file exists on your hard disk:

if (file_exists($myImageDir . '/' . $_GET["image_url"])) processImage();

Don’t forget to cleanup any GET or POST vars before using in your code.