// Custom Button on users.php - ADMIN
//add additional columns to the users.php admin page
add_filter('manage_users_columns', 'activate_user_in_table');

function activate_user_in_table( $column ){
    $column['active'] = 'Activeer';
    return $column;
}

add_filter('manage_users_custom_column',  'add_display_value', 50, 3);
function add_display_value( $value, $column_name, $user_id ){
    $user = get_user_meta( $user_id );

    // Get the current status from the user.
    $value =  $user['sophima_user_active'][0];

    // Based on the output 1 or 0 I have to create the button to activate or desactivate the user.
    switch ($value) {
        case 1 :
            $button = '<a href="'.add_query_arg(array('block' => '0','user_id' => $user_id)).'" name="display_as-'.$user_id.'" class="button green">Blokkeren</a>';
           return $button;
            break;

        case 0 :
            $button = '<a href="'.add_query_arg(array('activate' => '1','user_id' => $user_id)).'" name="display_as-'.$user_id.'" class="button green">Activeer</a>';
            update_usermeta($user_id, 'sophima_user_active', 0 );

            return $button;
            break;
        default:
    }

    return $value;
}

update_usermeta($user_id, 'sophima_user_active', 1 );

update_usermeta($user_id, 'sophima_user_active', 1 );