I get the following error when running the E-Commerce example from code downloaded from Wrox site:

Warning: Wrong parameter count for mysql_query() in C:\Apache Group\Apache2\htdocs\checkout2.php on line 244.

Line 244 is the "or die" line in the following command

$results = mysql_query($query)
        or die (mysql_query());

Correct me if I'm wrong...but i think it needs to be

"or die (mysql_error());" not "or die (mysql_query());"

Hope that helps

Mike