betsyv

Thanks for the detailed answers!
I’m beginning to grasp the concepts

If I may, I have one more question..

You explained:

If I need to do something at a certain time, I will look for calls to the do_action() hook. A simple example would be if I wanted to print custom css to the head of the document.

Isn’t printing to the user client ‘Filtering’?

Filters are functions that WordPress passes data through, at certain points in execution, just before taking some action with the data (such as adding it to the database or sending it to the browser screen). Filters sit between the database and the browser (when WordPress is generating pages) [again from codex above..]

How is the context of printing custom css (Action function) different from the context of a Filter function?

Thanks for your time and effort!

Extremely appreciated 🙂
Betsy