why are you using extract() in your first code? extract makes variables the same name as the column name and then you echo $row['column']; ??
you cant echo a variable = value string, either do
or
You cant name a key like you have in REQUEST, it has to be in quotes
I would suggest you start here:
http://ie2.php.net/manual/en/tutorial.php
The PHP Manual is very good..
The purpose of GET or POST or REQUEST are listed under the variables (predefined I think) in the manual