在页面加载时禁用字段，并在保存数据之前启用它-php codeigniter

<input type="text" name="myField" value="Some Value" disabled>

<form action="save_data" method="post">
  <input type="text" name="myField" value="Some Value" disabled>
  <input type="submit" value="Save">
</form>

public function save_data() {
  $this->load->library('form_validation');
  
  $this->form_validation->set_rules('myField', 'My Field', 'required');
  
  if ($this->form_validation->run() == FALSE) {
    // 表单验证失败，返回错误信息
  } else {
    // 表单验证成功，保存数据
    $myField = $this->input->post('myField');
    
    // 启用字段
    unset($_POST['myField']);
    
    // 保存数据的逻辑
  }
}