Using same MySQL Connection in different PHP pages

Question

I am creating a simple Web Application in PHP for my college project. I am using the MySQL database.

I connect to the database in login.php. After connection I assig

Answer 1

The second request may not be served by the same web server process as the first, which means that you will have a completely separate set of database resources. You'll need to connect again in this new process in order to run queries.