Need help related to my codeigniter wallpaper script

In the form where you "add favorites", somehow 'hash' aren't populated or incorrect value.
You need to find the file that adds 'hash' value to that page.

Yes, just a trailing slash "/" was missing in file where send the post. (I made all URLs to be 301 redirected with an end trailing slash "/" and this one from file, don't had a "/" and every time when was called it redirects to the version with the "/" and the hash wasn't sent. I hope you understand what i meant to say .

Now, once i added "/" in this file where the ajax call is made, no redirect and works.

Again, @jreklund thank you for your explanation.