Adding hooks directory; comment cleanup for professionalism

HelloWorld.php

@@ -1,6 +1,6 @@
 <?php
 
-# File: helloworld.php
+# File: HelloWorld.php
 # 
 # Description: This file exemplifies printing 'Hello world!' in PHP.
 # 
@@ -11,14 +11,14 @@
 
 
 ### String to print
-$helloWorld="Hello world!";
+$_helloWorld="Hello world!";
 
 ### <summary>
 ### Prints 'Hello world!' 
 ### </summary>
 function PrintHelloWorld() { 
-    global $helloWorld;
-    echo $helloWorld."\n";
+    global $_helloWorld;
+    echo $_helloWorld."\n";
 
 }