Better single session login

[a23]

If option is selected, by default WPLMS dows not allow to user to login unless they have logged out from other computer / session & gives a error message. But users rarely remember to logout their sessions. Instead posting this code that will automatically logout the users previous session & login to current computer. This is achieved by storing the users latest session inside user meta fields & then comparing the current session with it. PS You will logged out of admin on first time activation

if( !class_exists( 'WPSingleUserLoggin' ) )
{
    class WPSingleUserLoggin
    {
        private $session_id; 
    
        function __construct()
        {
            if ( ! session_id() )
                session_start();
    
            $this->session_id = session_id();
    
            add_action( 'init', array( $this, 'init' ) );
            add_action( 'wp_login', array( $this, 'wp_login' ), 10, 2 );
        }
    
        function init()
        {
            if( ! is_user_logged_in() )
                return;
                
            $stored_sess_id = get_user_meta( get_current_user_id(), '_wp_single_user_hash', true );
            
            if( $stored_sess_id != $this->session_id )
            {
                wp_logout(); 
                wp_redirect( wp_login_url() );
                exit;
            }
        }
        function wp_login( $user_login, $user )
        {
            update_user_meta( $user->ID, '_wp_single_user_hash', $this->session_id );
            return;
        }
    }
    new WPSingleUserLoggin();
};

Original code link : https://benmay.org/wordpress/single-user-wordpress/

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