//使用一个表的数据做下拉框函数

    function buildSelect($tableName, $selectName, $valueFieldName, $textFieldName, $selectedValue = '')

    {

        $model = D($tableName);

        $data = $model->field("$valueFieldName,$textFieldName")->select();            //取需要的两个字段值

        $select = "<select name='$selectName'><option value=''>请选择</option>";        //下拉框name即存进表字段

        foreach ($data as $k => $v)

        {

            $value = $v[$valueFieldName];        //值value <= 字段值【表id】

            $text = $v[$textFieldName];            //显示内容 <= 字段值存放内容

            if($selectedValue && $selectedValue==$value)    //判断是否选中

                $selected = 'selected="selected"';

            else

                $selected = '';

            $select .= '<option '.$selected.' value="'.$value.'">'.$text.'</option>';

        }

        $select .= '</select>';

        echo $select;

    }