public static function render_all($user_id) { $fields = WJ_FieldUser::get_all($user_id); if (isset($fields)) { $output = ''; foreach ($fields as $field) { $field_render = new self($field); $output .= '<tr>' . '<th scope="row">' . $field_render->label() . '</th><td>' . $field_render->input() . '</td></tr>'; } return $output; } else { return null; } }