Where to put arrays with constant value that will be accessed many times?

Question

I have some arrays storing the possible parameters for some 3D printer commands. I use this to check if the command is legal. I am confused about where I should put these ar

Answer 1

If you are really looking into understanding how code performance can be measured, you should get familiar with Big-O notation.

What is Big-O? Big-O cheat sheet

Other than that, define them as protected class base properties for static data.

class foo
{
    protected static $bar = array();
}