Ok when you submit the form to a php script it automatically breaks the supplied data into the variable names given in the form it also supplies the data in one long variable called QUERY_STRING.
For example
<FORM action="process.php" method="post" name="info" enctype="text/plain">
name: <INPUT type="text" name="namefield" size=30>
<P>
Email: <INPUT type="text" name="namefield" size=30>
<P>
<INPUT type="submit" value="Submit">
</FORM>
If you typed name in the name box and emailaddress in the email box.
when the submit button is hit the php script will receive the following.
$name with the value of "name"
$email with the value of "emailaddress"
and
$QUERY_STRING with the value of "name=name&email=emailaddress"
Hope that helps.
Mark.