Strange output using include()/require()

Hello, I'm new to this newsgroup so I hope this is the right place to ask for help. I have a script that starts with the following lines: Line1: require_once 'config.php'; Line2: require_once 'common.php'; Line3: require_once 'HTTP/Request.php'; However, when I run it on the browser, where line 1-2 is, I'll see the following output  That's two times  So it only affects both config.php and common.php. I can't seem to figure out what's wrong with both files (they contain constants and a couple functions) since it does not affect HTTP_Request (from PEAR) at all. I hope that makes sense. Any help is appreciated. Thanks! -m.