What i'm i doing wrong? here is my code
FUNCTIONS.PHP
<?php
function get_header(){
include 'header.php';
}
function get_footer(){
include 'footer.php';
}
HEADER.PHP
<?php function set_title($title){
echo $title;
}
?>
<!DOCTYPE html>
<html>
<head>
<title><?php set_title();?></title>
<meta charset="UTF-8">
<meta name="description" content="Photography site" />
<meta name="keywords" content=" Angelic Photography" />
<!-- <link rel="stylesheet" href="assets/css/main.css"/>-->
<link rel="stylesheet" href="assets/css/bootstrap.min.css"/>
<link rel="stylesheet" href="assets/css/grayscale.css"/>
</head>
HOMEPAGE.PHP
<?php
require 'functions.php';
$title = ("homepage");
get_header();
php get_footer(); ?>