Trying to be more helpful than "read the article somewhere yada yada" let me describe 3 methods I think you can use:
1) Sessions - You send your form to a php page that opens a session using session_start() and session_register() to store variables in the session. With only ones session ID (stored on a cookie or sended in the url of your pages) you can store (and transport) as many variables as you need, like login, password, user id etc. You can of course read this values in any page you use session_start() and is an easy way to implement secured zones on your site and to pass variables to any number of pages you want. Try
http://www.php.net/manual/en/ref.session.php to learn more about sessions, and the excelent article of Mattias Nilsson here in
http://www.phpbuilder.com/columns/mattias20000312.php3
2) Database. You send your form to a php page that stores the form values on a database, as MySQL. From then, every page that need those variables reads them from the database. If you want to use this method to implement secure zones, you'll have to implement some sessions to control when a user logs in and logs out. You can combine it with PHP sessions to implement a real secured zone. You can even use text files to store variables in case you won't have many members in the protected zones.
If you happen to have MySQL on your system, try:
http://www.php.net/manual/en/ref.mysql.php
to know about the things you can do. If you prefer to use text files, try the dbm section of the PHP manual in:
http://www.php.net/manual/en/ref.dbm.php
to learn how to store and recover simple data strings from files.
3) Javascript - In case you want to pass values to let say 3 pages in frames, you may use Javascript to pass the form values on the fly. Window 1 pass the values to window 2 and window2 pass them to window 3.
4) URLs - You can use a php file to define the frame set and pass the variables to the windows using the URL of each page, i.e. your form send the variables $userID and $login. Your frameset definition could be something like:
<pre>
<frameset cols="150," rows="" border="0" frameborder="0">
<frame src="left.php3?userID=<?echo $userID ?>" name="nav">
<frame src="main.php3?login=<?echo $login ?>" name="phpmain">
</frameset>
</pre>
(I hope the code reads fine).
There's a lot more options and combinations depending on what you want or need to do.
I've wrote a web based e-mail client and have to use sessions, database, javascript and variables in urls to implement the whole system.
Good luck!
