Updated demo template file for PHP demos

Author: jaspermdegroot

docs/demos/_demo-template/file-name.php

@@ -0,0 +1,3 @@
+<?php
+	// PHP script here
+?>

docs/demos/_demo-template/index.html

@@ -14,7 +14,7 @@
 	</script>
 	<script src="../../../js/"></script>
 	<script>
-		// Script here
+		// JavaScript here
 	</script>
 	<script id="myScript">
 		// myScript
@@ -42,10 +42,11 @@ <h2>Heading</h2>
 
 			<h3>Subheading</h3>
 
-			<div data-demo-html="true" data-demo-js="true" data-demo-css="true">
+			<div data-demo-html="true" data-demo-js="true" data-demo-css="true" data-demo-php="file-name">
 				<!-- data-demo-html="true" to include the markup in this div in the source code view -->
 				<!-- data-demo-js="true" to include scripts from the head in the source code view -->
-				<!-- data-demo-css="true" to include style from the head in the source code view -->   
+				<!-- data-demo-css="true" to include style from the head in the source code view -->
+                <!-- data-demo-php="fileName" to include PHP script from file-name.php in the source code view --> 
 			</div><!--/demo-html -->
 
 			<h3>Subheading</h3>