[PHP] weird urls

How come some URLs have all these questions marks and stuff like that? Below: source.php?url=/index.php __ Pre-order the NEW Netscape 7.0 browser. Reserve your FREE CD and pay only $2.99 shipping and handling. http://cd.netscape.co

[PHP] need help

Hi, how come on the "view source" link on the bottom of the php.net homepage shows a whole mess of php code but when I select "view page source" in Internet explorer or netscape in shows everything as html on the home. This is kinda hard for me to explain, here is an example below: Ever wond