Horde_Form::preserveVarByPost PHP Method

    function preserveVarByPost(&$vars, $varname, $alt_varname = '')
    {
        $value = $vars->getExists($varname, $wasset);
        /* If an alternate name is given under which to preserve use that. */
        if ($alt_varname) {
            $varname = $alt_varname;
        }
        if ($wasset) {
            $this->_preserveVarByPost($varname, $value);
        }
    }