Description:
------------
I am using PHP 5.2.0, Dreamweaver 8 and IE 7. I receive an error on the webpage pointing to my TextBox class (line 5) when I attempt to use the keyword "implements" in that class.

Reproduce code:
---------------
(The line numbers are for reference only and are not actually in the class.)

------Element.php--------
1 <?php
2	interface Element 
3	{
4		public function getUID(); //signature
5	}
6 ?>
-------------------------



------TextBox.php--------
1 <?php
2
3	require_once 'Element.php';
4	
5	class TextBox implements Element
6	{
7          public function getUID()
8	    { //implementation }
9      }
10 ?>
-------------------------





Expected result:
----------------
I expect the application to recognize the keyword "implements" as a valid keyword. In the case of Dreamweaver it should color code the word "interface" as a keyword but it does not which suggests it does not recognize "implements" as a valid keyword such as "extends" or "class".

Actual result:
--------------
I get the error: 

"Parse error: syntax error, unexpected T_STRING, expecting T_VARIABLE in subscribers_kiosk/baseclass/TextBox.php on line 5"

on the webpage when I try to include the "TextBox.php" page into any other php page.