$_Request from 4.3 to v5.x

Folks I am currently using 4.3.7. I have a script which accepts three POSTed variables from a basic form. Under 4.3.7 the script runs fine and the variables are successfully passed to the script. I am testing 5.0 C3 and receive the following error PHP Notice: Undefined index: searchtype in c:\http\cgi\list7.php on line 13 <script language='php'> $searchtype = $_REQUEST['searchtype']; -- this is line 13 $searchterm = $_REQUEST['searchterm']; $matchtype = $_REQUEST['match']; Any suggestions on the best way to access data input into a FORM in version 5.x would be most appreciated. Mike