Question

What is the best way?

1. include the script
2. write the script as function in for example functions.php, include the functions.php and call function

thanks

Answer 1

I still don’t understand the differences of your approaches.

But if you have a lot code in this file, indeed, the best way would be to write your code as functions (if you do not already have that) and create several files that contain those.

You should try to categorize your functions and create an own file for each category. Then you have more control over which functions you include and you don’t have to include all of them, you just include those files you need the functions from.

For example you can create a file database_util.php that contain database related functions, etc.

In the long run, you should learn about Object Oriented Programming, but don’t misuse classes / objects as container of functions. This is not the purpose of OOP and won’t help you much.