Codeigniter:正在验证两个Date字段 - Codeigniter : Validating of two Date fields

我有两个日期字段来收集用户的数据。需要使用codeigniter表单验证类对其进行验证。

场景：

第一个日期字段可以为空
第二个日期字段不能为空
第一个日期字段不应大于今天的日期
第二个日期字段应大于第一个日期字段

$this->form_validation->set_rules（'first_field'，'first field'，'trim|required'）；

$this->form_validation->set_rules（'second_field'，'second field'，'trim|required|callback_check_equal_less['.$this->input->post（'first_fild'）'.]'）；

回调函数为：

function check_equal_less($second_field,$first_field)
          {
            if ($second_field <= $first_field)
              {
                $this->form_validation->set_message('check_equal_less', 'The First &amp;/or Second fields have errors.');
                return false;       
              }
              else
              {
                return true;
              }
          }

如果你选择了正确的日期，只需将其与strtotime进行转换，那么比较将很容易

这是修改后的函数

function check_equal_less($second_field,$first_field)
          {
            if (strtotoime($second_field) <= strtotime($first_field))
              {
                $this->form_validation->set_message('check_equal_less', 'The First &amp;/or Second fields have errors.');
                return false;       
              }
              else
              {
                return true;
              }
          }

在/application/controllers/Welcome控制器中，我添加了一个处理程序函数，并设置了验证规则和自定义回调（并定义了到此控制器函数$route['action_page'] = 'welcome/dates_validation';的自定义路由）：

public function dates_validation(){
    $this->load->helper(array('form', 'url'));
    $this->load->library('session');
    $this->load->library('form_validation');
    $this->form_validation->set_error_delimiters('<div class="alert alert-danger">', '</div>');
    $this->form_validation->set_rules('first_field', 'First date', 'trim|callback_check_equal_less');
    $this->form_validation->set_rules('second_field', 'Second date', 'trim|required|callback_check_greater_then['.$this->input->post('first_field').']');
    $this->session->set_flashdata('result', '');
    if ($this->form_validation->run() == FALSE)
    {
        $this->session->set_flashdata('result', validation_errors());
    }
    else{
        $this->session->set_flashdata('result', '');
    }

    $this->load->view('forms');
}
public function check_equal_less($date){
    $today = strtotime(date("Y-m-d"));
    $first_date = strtotime($date);
    if ( ($date != "") && ($first_date > $today) )
    {
        $this->form_validation->set_message('check_equal_less', 'The First date can not be greater than today!');
        return false;       
    }
    else
    {
        return true;
    }
}
public function check_greater_then($second_date, $first_date){
    
    if ( ($first_date != "") && ($second_date != "") && (strtotime($first_date) > strtotime($second_date)) )
    {
        $this->form_validation->set_message('check_greater_then', 'Second date field should be greater than First date field!');
        return false;       
    }
    else
    {
        return true;
    }
}

此控制器的视图文件：可选地，我加载了Boostrap，因为我用格式化了消息

<div id="container">
    <h1>Date validations</h1>
    <?php echo $this->session->flashdata('result'); ?>
    <form action="/action_page" method="post">
      
      <label for="first_field">First date:</label><br>
      <input type="date" id="first_field" name="first_field" value="<?php echo set_value('first_field'); ?>"/></br>
      
      <label for="second_field">Second date:</label><br>
      <input type="date" id="second_field" name="second_field" value="<?php echo set_value('second_field'); ?>"/></br></br>
      <input type="submit" value="Submit">
    </form> 
</div>