Quantity Not adjusting

Question

I am trying to adjust the quantity of an item when a user enters the quantity and click on Update but I am having a problem getting it to work. When you end the quantity and

Answer 1

i don't see any

session_start();

In your PHP code, if you want to work with the session of the user, you must include session_start(); in the beginning of your php file.

That includes ajax files.

If you make an ajax call from a php page that has session_start, that DOES NOT MEAN that the ajax script will be "in session". You MUST include session_start(); in the ajax script.