I have tried to make my first PHP script, but it didn't work.

Here's the code:

<HTML>
<HEAD>
<TITLE>Today's Date</TITLE>
</HEAD>
<BODY>
<P>Today's Date (according to this Web server) is:
<?php



echo( date("l, F dS Y.") );


?>
</BODY>
</HTML>

When i made a link from one webpage on my PWS (personal web server), and tried it, it didn't show any date! Can the problem be that i have not installed PHP properly?