Using session_decode

I need to d开发者_Go百科ecode session data to find out if a user currently has a session.

What would be the best way to do this, using session_decode?

Use session_id() to see if there is a current session. If there is no current session, it will return an empty string.

Do a print_r($_SESSION); to see what session variables there are. Then if you need to do a specific condition

<?php

    if ($_SESSION['userid']) {

        // Do things
    }

?>

eg

<?php

    session_start();

    $_SESSION['userid'] = 1;
    $_SESSION['username'] = 'myusername';
    $_SESSION['password'] = 'mypassword';

    if ($_SESSION['username']) {

        echo "Welcome " . $_SESSION['username'] . "!";
    }

?>