Adding different headers for different pages

Greetings! I am working in the child theme of Triden, and I have a client who wishes to have a different header on each page.

I did this previously for a site using the theme Thesis but am having translation problems!

In Thesis, you add the code to custom-functions.php and then use hooks to place it.

I ‘borrowed’ the code and placed it into the header.php file of my child theme, and it is not working. I am guessing that I need to ‘call’ the function, perhaps, but am not sure.

The code works perfectly in Thesis, so I suspect that I am missing something very simple. I’ll add the code to a follow-up post.

Help would be much appreciated!