Hi All,

I have a few questions regarding Ajax and Json if anyone could help clear up for me.
I am designing a mobile application (as a small project) which will send continious live data to a php file which will then forward this to be stored in a MySQL database.

As data will be constantly sent to the php file from a mobile application, what is the approach to make sure data is being sent from the right device? Would I need to add the username and password to each data set being sent?