What's the difference between
if (isset($submit_happening))
and
if $submit_happening)

John

[EMAIL PROTECTED] wrote:

> On Fri, 22 Feb 2002 21:38:16 -0500, you wrote:
>
> >I'd to know how difficult it is to achieve the following:
> >
> >Create login page, when the submit button is clicked, the user info is checked 
>against a database as
> >to whether is login info is valid. if it is valid, a page is displayed that lists 
>all of the classes
> >that the user has registered for, meaning each user will see a different list of 
>classes.
>
> At first, I thought this was a homework question, but that seems
> unlikely. Ok, one way to do this is to have a form submit to itself.
>
> Briefly :
>
> <?
> if (isset($submit_happening)) {
>         if ($username == "david" && $password="xyzzy") {
>                 echo("Successfully logged in");
>         } else {
>                 echo("Not logged in");
>         }
> } else {
> ?>
> <form method="post" action="<?=$PHP_SELF?>">
> <input type="hidden" name="submit_happening" value="1">
> <input type="text" name="username">
> <input type="password name="password">
> </form>
> <?
> }
> ?>
>
> Untested. If you want to store a user's logon status permanently, look
> at sessions. http://www.php.net/manual/en/ref.session.php
>
> djo

--
John Taylor-Johnston
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