if (!class_exists('Bxcft_Field_Type_RKToken'))
{
    class Bxcft_Field_Type_RKToken extends BP_XProfile_Field_Type
    {
        public function __construct() {
            parent::__construct();

            $this->name             = _x( 'RKToken', 'xprofile field type', 'bxcft' );

            $this->set_format( '/[-0-9a-zA-Z.+_]$/', 'replace' );
            do_action( 'bp_xprofile_field_type_text', $this );
        }

        public function admin_field_html (array $raw_properties = array ())
        {
            $html = $this->get_edit_field_html_elements( array_merge(
                array( 'type' => 'text' ),
                $raw_properties
            ) );
        ?>
            <input <?php echo $html; ?> />
        <?php
        }

        public function edit_field_html (array $raw_properties = array ())
        {
            if (isset($_GET['var1'])) {
                echo "OK";
            }
            else {
                print_r($_GET);
            }