proper way to logout from a session in PHP

user_329292 0
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I have read many php tutorials for logout scripts, i am wondering what could be the proper way to logout from a session!

Script 1

<?php
session_start();
session_destroy();
header("location:index.php");
?>

Script 2

<?php
session_start();
session_unset();
session_destroy();
header("location:index.php");
?>

Script 3

<?php
session_start();
if (isset($_SESSION['username']))
{
    unset($_SESSION['username']);
}
header("location:index.php");
?>

Is there any more effective way to do this?? A session can always be created by logging back in, so should i bother about use of session_destroy() and use unset($_SESSION['variable']) instead? which one of the above 3 script is more preferable?

session php
4 Answers
<?php
// Initialize the session.
session_start();
// Unset all of the session variables.
unset($_SESSION['username']);
// Finally, destroy the session.    
session_destroy();

// Include URL for Login page to login again.
header("Location: login.php");
exit;
?>
user_57190380
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