Does function definition order matter?

Question

In the script below, does the order in which items are declared matter?

For example, if the add_action points to a function that has not yet been defined? Does it ma

Answer 1

Quoting the User-defined functions section of the manual :

Functions need not be defined before they are referenced, except when a function is conditionally defined

So, basically : you can call a function before its definition is written -- but, of course, PHP must be able to see that definition, when try to call it.