How to I inject only certain parts of PHP page using PHP

Question

I know I can include other files using PHP

Now my question is how do I inject only certain parts of \

Answer 1

The easiest (and usual) way is to simply make separate header.php and footer.php files, and access them where you need them. There's no direct support for only loading parts of a file.

Edit (to respond to your comment on the other answer about using separate functions): Let's say your file.php looks like this:

   header content goes here

    footer content goes here

Then in the page you're calling it into, you can use and to produce the content where you want it.