下拉需要在codeigniter中不工作

Question

我想使邮件是必填字段，但不知何故它不工作，我错过了什么？

<div class="col-md-5 "> 
 
    <div class="control-group form-group"> 
 
    <label class="control-label"> 
 
     Escalation Email Ids 
 
    </label> 
 
    <div class="controls"> 
 
     <?php $options=a rray(); if(count($useridsoptions)){ foreach($useridsoptions as $key=>$val){ $options[$key]=$val; } } echo form_dropdown('esc_users[]', $options, explode(",",$row->esc_users),'id="esc_users" class="form-control function col-md-12 select2", reqired="required" multiple'); ?> 
 
    </div> 
 
    </div> 
 
</div>

Answer 1

注意到代码中的几个问题。 required & array拼写是form_dropdown()功能在最后PARAMS使用错误而且错误的语法

试试这个

<div class="col-md-5 "> 
    <div class="control-group form-group"> 
    <label class="control-label"> 
     Escalation Email Ids 
    </label> 
    <div class="controls"> 
     <?php $options=array(); if(count($useridsoptions)){ foreach($useridsoptions as $key=>$val){ $options[$key]=$val; } } echo form_dropdown('esc_users[]', $options, explode(",",$row->esc_users),'id="esc_users" class="form-control function col-md-12 select2" required="required" multiple'); ?> 
    </div> 
    </div> 
</div> 

Answer 2

笨下拉验证示例

<?php echo form_label("Country: 
","country"); 
    $data = array(
      "selectcountry" => "Select Country",    
      "CA" => "Canada", 
      "US" => "United States", 
      "ZW" => "Zimbabwe" 
       ); 
    echo form_dropdown('country', $data, 'selectcountry');?> 

形式验证规则

<?php $this->form_validation->set_rules('country', 'Country', 'required|callback_country_check');?> 

回调方法

public function country_check() 
    { 
      if ($this->input->post('country') === 'selectcountry') { 
      $this->form_validation->set_message('country_check', 'Please choose your country.'); 
      return FALSE; 
     } 
     else { 
      return TRUE; 
     } 
    }