Img not seen using PHP
 

I am fairly new to PHP and am trying to include an image on each page as my header. (I want to use PHP in the event I decide to change the image later.) However, the image does not show up on html page.

This is the html code.
<div id="header"><!-- Start of header -->
<?php include 'includes/header.php'; ?>
</div><!-- End of header -->

This is the header.php file.
<center><img src="classof74.jpg" /></center>

The image is in the same folder (includes) as the header.php file.

Please help!

If that's the case, your image link should be:
Dave