Login and be redirected back to page you were on

[hubbardude]

I'm looking for a way to first, check to see if a user is logged in or not, and second, when they login they stay on the page they came from. Or, I suppose they would go to the login page and then be redirected back to the page where they clicked the login link.

Can anyone point me to a good resource or give me some sample code? Basically it's a small site, and I want to display admin options on different pages for people who are logged in, rather than have a central or separate admin page.

In the registration form I'm capturing just username, password, and email. I figure that should be enough.

Thanks.

[future448]

You want to use sessions to see if they are logged in.

Start your page with:

session_start();

So after they have submitted the login info and you have verified it is all ok set a session by simply declaring it:

$_SESSION['logged_id'] = true;

Then when you want to only display something to people who are logged in you can use something like:

if($_SESSION['logged_id']) {

 // do stuff here
}

In order to send them back to the page they were trying to view before they logged in you will need to keep track of that page somehow.

For example if you have a link that says login here you could append the page to the url

<a href="login.php?page=this_page.php">Login Here</a>

You can then follow what page equals by either using it as a hidden field in your login form or again using the sessions.

So assuming you include a hidden field in your login form like:

<input type="hidden" name="page" value="<?php echo $_GET['page']; ?>" />

You will have it after you have verified their login details and set the login session so you now know where to send them

if(isset($_POST['page']))  {

$location = $_POST['page'];
  }
   else {

$location = 'index.php'; // default location in case none was passed
 }

//redirect them
   header(sprintf("Location: %s",$location));