Which is faster? Constants, Variables or Variable Arrays

Question

My current web application uses about 30 or so Contants (DEFINE()). I am reading things that variables are quicker. Provided that there is a naming convention to avoid varia

Answer 1

The difference would be really small (micro optimizations). You would better encapsulate some of your constants in classes so you can access them by Classname::CONSTANT to not pollute the global namespace of your application.