title: How to maintain a mysql connection between multiple AJAX calls?
body: <p>I have a web page using jQuery to perform multiple AJAX calls, not all at once. Each AJAX call is made to a different PHP file, and each file uses a connection to the same mysql server and database.  Creating a connection in each of these AJAX calls is awful for performance, how can I create one connection and maintain it throughout all of the AJAX calls?  Thanks!</p>