How to deny direct access to files in AJAX directory

Question

I have several pages that call in content via jQuery .ajax. I dont want the content visible on the page so thats why I went with .ajax and not showing/hiding the content. I

Answer 1

Make a temporary time-coded session variable. Check the variable in the php output file before echoing the data.

OR, if you don't want to use sessions.. do this:

$key = base64encode(time().'abcd');

in the read file: base64decode explode by abcd read the time. Allow 5 seconds buffer. If the time falls within 5 seconds of the stamped request. You are legit.

To make it more secure, you can change your encrypting / decrypting mechanism.