Adding register & login in WordPress website

integrating some of the suggested functions into your code:

<?php
        $c_user = wp_get_current_user();
        if( !is_user_logged_in( $c_user->ID ) ) :
        echo '<a href="' . esc_url( wp_login_url() ) . '" alt="' . esc_attr( 'Login', 'textdomain' ) . '">';
        echo _e( 'Login', 'textdomain' );
        echo '</a>';
        wp_register("https://wordpress.stackexchange.com/", '');
        else :
            echo 'Hello ' . $c_user->display_name . ', ';
            echo ' <a href="' . esc_url( wp_logout_url( home_url() ) ) . '" alt="' . esc_attr( 'Logout', 'textdomain' ) . '">';
        echo _e( 'Logout', 'textdomain' );
        echo '</a>';

        endif;
?>

some remarks:

  • for the ‘Register’ link to show, you need to have ticked in the dashboard:
    ‘Settings’ – ‘General’ – ‘Membership [ ] Anyone can register

  • the ‘Logout’ will redirect to the home page; if you don’t want that, remove home_url() from the code