1function set_page_title(){
2 global $page_title;
3 /*
4 you should make the variable global so the function can access it and set it to the page title
5 otherwise you will get an error.
6 */
7 if(isset($page_title)){ /*Check if my code has that variable*/
8 echo $page_title;
9 }
10 else{
11 echo "Page Title";
12 }
13}
14/*
15 HTML Layout
16 <!DOCTYPE html>
17 <head>
18 <title><?php set_page_title() ?></title>
19 </head>
20 ...
21*/
1//1. Simply add $title variable before require function
2<?php
3
4$title = "Your title goes here";
5require("header.php");
6
7?>
8
9
10//2. Add following code into header.php
11
12<title><?php echo $title; ?></title>
13