Declare Global Variables for Customization

Hello,

I need to show some icons in my product page. They depend on product attributes (they are like a score).
I’ve made a function to convert the value of the attribute ($value = 1) into icons (with a for()). This is stored in functions.php and called in the template.

The thing is that obviously this is not the smartest way to do it because of memory. I assume that if for every product page, WP has to run the same function over and over…I should save it globally, but there is a lot of advice against this on the internet.

What’s the way to go about this? Thanks!