header can now contain special titles

includes/header.php

@@ -17,7 +17,7 @@
       crossorigin="anonymous"
     />
 
-    <title>Home | Pfosten Dynamics</title>
+    <title><?php echo htmlentities(PAGE_TITLE); ?> | Pfosten Dynamics</title>
     <link rel="icon" href="./img/favicon.png" />
   </head>
 

index.php

@@ -1,4 +1,9 @@
-<?php require('includes/header.php'); ?>
+<?php
+
+define('PAGE_TITLE', 'Home');
+
+require('includes/header.php');
+?>
     <br />
     <br />
     <br />