How do you use session variables in wordpress?

Replace:

global $wp_session;

With:

$wp_session = WP_Session::get_instance();

Make sure you add $wp_session = WP_Session::get_instance(); before you try to echo the variable on page 2.

1. Add below code in function.php file

function register_my_session(){    if( ! session_id() ) {        session_start();    }}add_action('init', 'register_my_session');

2. After that you can store value in session variable like

$_SESSION['something'] = $xyz

Introducing WP_Session:

Example :

global $wp_session;$wp_session['user_name'] = 'User Name'; // A string$wp_session['user_contact'] = array( 'email' => 'user@name.com' );// An array$wp_session['user_obj'] = new WP_User( 1 ); // An object

Wordpress session functions:

1. wp_session_cache_expire() – get the session expiration time
2. wp_session_commit() – write session data out to the transient
3. wp_session_decode() – load data into the session from a serialized string
4. wp_session_encode() – write session data out to a serialized string
5. wp_session_regenerate_id() – change the ID of the current session to a new, random one
6. wp_session_start() – start the session and load data based on the user’s cookie
7. wp_session_status() – check the status of the current session
8. wp_session_unset() – clear out all variables in the current session
9. wp_session_write_close() – write session data and end session.