In PHP/MySQL should I open multiple database connections or share 1?

Question

I am wanting to hear what others think about this? Currently, I make a mysql database connection inside of a header type file that is then included in the top of every page

Answer 1

Its not recommended to execute multiple small queries where the work can be done using just one query, you can use a single query to get data from multiple tables and ieven multiple databases. see the link below:

http://www.x-developer.com/php-scripts/sql-connecting-multiple-databases-in-a-single-query