Codeigniter：下拉验证 set_rules

Question

我可以知道如何确保用户选择了 Dr、Mr、Ms、Mdm 并且当他们提交表格时如果称呼为空白，它将 return 一条错误消息set_rules().

代码：

echo "<p>Salutation: ";
    $salutationOptions = array(
                  ''  => '',
                  'Dr'  => 'Dr',
                  'Mr'    => 'Mr',
                  'Ms'   => 'Ms',
                  'Mdm' => 'Mdm',
                );
    echo form_dropdown('salutation', $salutationOptions, '');
    echo "</p>";

Answer 1

在HTML中使用required，或者

喜欢这个

 $this->form_validation->set_rules( "Salutation","Salutation","required"); 

I hope this might help you

https://ellislab.com/codeigniter/user-guide/libraries/form_validation.html#validationrules

Answer 2

例子在视图部分：

 $options = array('0' => 'SELECT SHIRT', '1' => 'Small Shirt', '1' =>
'Medium Shirt', '2' => 'Large Shirt', '3' => 'Extra Large Shirt', );
echo form_open('welcome/index');
echo form_error('field name to display error');
echo form_dropdown('field name', $options);
echo form_submit('submit', 'submit');
echo form_close();

控制器部分：

$this->load->helper('form_validation');
$this->form_validation->set_rules('field name', 'name have to display in the error message', 'required'); 
if ($this->form_validation->run() == false) {
$this->load->view('your page name'); }else{
$this->load->view('another page');}

Answer 3

在视图文件中，您可以使用以下方法进行客户端验证：

echo "<p>Salutation: ";
 $salutationOptions = array(
                  ''  => '',
                  'Dr'  => 'Dr',
                  'Mr'    => 'Mr',
                  'Ms'   => 'Ms',
                  'Mdm' => 'Mdm',
                );
    echo form_dropdown('salutation', $salutationOptions, '', 'required="required"');
    echo "</p>";

当用户尝试在不从下拉列表中选择的情况下提交时，系统会提示他们应该从下拉列表中进行选择。

如果你想在服务器端，你可以这样做：

$this->form_validation->set_rules('salutation', 'Salutation', 'required')
if($this->form_validation->run()){
    /*user has selected. use the data now*/
}else{
    /*user has not sleected data, throw error back*/
}

Answer 4

最好使用 foreach() 循环。这是我遇到的方式。

<?php foreach($classes as $class) { ?>
   <option value="<?php echo $class->classesID; ?>" <?php echo set_select('class', $class->classesID); ?>>
      <?php echo $class->classes; ?>
   </option>
<?php } ?>

Codeigniter：下拉验证 set_rules

Codeigniter: dropdown validation set_rules

php

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