Why should i create dynamic Header & footer? (New to PHP)

Hi, i have been going through this PHP tutorial course. Normally i have been creating website in HTML and CSS format.

So this tutorial shows you how to create dynamic header and footer.

But my questions is why would you want to do that ?

 

It lets you reuse your code and makes it easier to update your code. Let's say you want to make a 5 page website with navigation in the header and footer. You make the page and show your client and he says "add another page". If you made the site in html you would have to update all 5 pages and the 6 page to change the navigation. But with a header and footer file you only have to make the change in two places and it updates on all pages.

Edit: to add to that, you could do the same thing with anything that is reused on multiple areas of the site such as a sidebar or a login window.

 

Agreed with Anveto..

 

and inorder for your footer and header to be dynamic, all your files should be in .php

 

PHP is my favorite, but really any scripting language will make your life easier (especially in the long run). When you say 'why,' I will answer your question with a question. Why use CSS (preferably in a style sheet and not on-page, in-line)? Also, do you want your navigation to have exactly the same links and look on every page, regardless of the user? Scripting (server-side and client-side) makes your life easier, more productive.