[SOLVED] Logout Script

[TheJoey]

Just wondering how i would create a logout function

 

Would it just be

<?php
session_start();
HTML CODE
unset($_SESSION['login']);
header('location index.php');
?>

 

or should i use session_destroy

mind you that im using sessions to maintain information from my shopping cart also.

[mikesta707]

if you test being logged in by (isset($_SESSION['login']) than that should work fine. have you tried it?

[GKWelding]

This is a login class I wrote a long time ago, hope it helps you:

 

class login{

var $response;

function set_user_login($username, $password)
{
$username=mysql_real_escape_string($username);
$password=mysql_real_escape_string($password);

     $query = "select salt from user where username='$username' limit 1";
     $result = mysql_query($query);

     if (mysql_num_rows($result) > 0)
     { 

          $user = mysql_fetch_array($result);

          $encrypted_pass = md5(md5($password).$user['salt']);

          $query = "select ID, username from user where username='$username' and password='$encrypted_pass'";
          $result = mysql_query($query);

          if (mysql_num_rows($result) > 0)
          {
               $user = mysql_fetch_array($result);
               $userid = $user['ID'];
               $encrypted_id = md5($user['userid']);
               $encrypted_name = md5($user['username']);

               $_SESSION['userid'] = $userid;
               $_SESSION['username'] = $username;
               $_SESSION['encrypted_id'] = $encrypted_id;
               $_SESSION['encrypted_name'] = $encrypted_name;

               $this->response = 'Correct';
          }
          else
          { 
               $this->response = 'Invalid Password';
          }
     }
     else
     {
          $this->response = 'Invalid Username';
     } 
}

function get_user_login()
{
return $this->response;
}

function set_user_logout()
{
     session_unset ();
     session_destroy ();
 echo"You have been successfully logged out, you will be redirected shortly.";
 echo"<META HTTP-EQUIV=\"Refresh\" Content=\"2;URL=index.php\">\n";
}

}

[TheJoey]

im not using databases.

but thanks.

[TheJoey]

would that only unset the login function and not the

cart session.

[mikesta707]

it unsets whatever variable you haveit unset, and no more. have you tried it

[TheJoey]

well yer.. it destroys the session but im not sure im declaring it right.

 

Do i have to use

<?

session_start();

isset($_SESSION['login']);

?>

 

or just session_start();

 

[mikesta707]

that doesn't make any sense. isset returns a boolean value, so its only of use in a control statement (if, while, for, etc.)

 

what are you trying to do with that snippet?

[TheJoey]

Sorry i did a little bit of research.

 

It works fine.

 

just wanted to understand it a little more.

[TheJoey]

Redirecting You Now

Warning: Cannot modify header information - headers already sent on line 48

 

im getting this error

for this code

its included in the body of my html code.

 

	  <?php
  unset($_SESSION['loginsuccessfull']);
  echo 'Redirecting You Now';
  header('location : ../../index.php');
  ?>

[cags]

headers can only be sent before output has begun, echo causes output (obviously, thats it's whole point ) so you cannot use the header function after using echo. Incidently there would be no point in echo'ing that to the screen anyway as the redirect is instantaneous, so just remove the echo statement. You should also put exit; on the line below the redirect as the script will continue to run before the redirect otherwise.