I have two different websites developed in two different platforms... one is a particular website written in Ajax PHP and MySQL and the other is a basic e-commerce website (Open Cart).
What I want is simple: both websites work and have their own databases. I want to integrate them to use the same users database for both websites, preferentially to have the opencart database as the one.
The programmer has to do some modifications on the ajax php website, which I have 100% the source code.
Also, everything that has involved with the database (user registration, logon, etc) has to be adequate in order to guarantee consistency.
Thank you very much.