HTML select Tag Title using Codeigniter 3

Question

I'm using Codeigniter 3.
The countries select box is an optional field on a form:

<select name="countries">
    <option>Choose a Country</option>
    <option value="en">England</option>
    <option value="fr">France</option>
    <option value="de">Germany</option>
</select>

I have the following line for the countries field validation:

$this->form_validation->set_rules('year',  'Year',    'trim|integer');

When I submit the form with the 1st option (Choose a Country), even without a value defined the validator sees something like this:

echo '<pre>';
print_r($this->input->post('year'));
echo '</pre>';

>> Choose a Country

.. when I am expecting something like false or null.
How can I make CI ignore the value when there isn't one selected?

Thanks in advance!

Answer 1

首先，您粘贴错误的行，我认为它应该是cbIniValues而不是countries。

你可以通过以下方式实现：

1. 为默认选择提供可以捕获的值。并在值等于year
时进行处理

none

1. 更改仅允许列表中的选项的验证规则。如果列表中的值不返回，则会出错。

<select name="countries">
    <option value="none">Choose a Country</option>
    <option value="en">England</option>
    <option value="fr">France</option>
    <option value="de">Germany</option>
</select>