使用Codeigniter，我如何判断表单是否已使用jquery submit()提交 - Using Codeigniter, how can I tell if a form was submitted with jquery submit()

Using Codeigniter, how can I tell if a form was submitted with jquery submit()

因此，我使用php构建了一个向导，其中一个表单要求用户上传图像。

我已经构建了所有的东西，唯一的问题是我必须能够说，在我的一个if语句中，如果表单是使用jquery的submit()方法提交的

下面的代码是在用户选择图片后在jquery中提交表单的。

var initUpload = function(){
    $('.filebutton').change(function(e){
        $("form").submit();
    });
};

这就是if语句的样子。

if($this->input->post('back')){
   //Tells me that the user clicked on the back button, and to go back 1 step in the wizard.    
}else if(???){
   //This is where I would like to say: if form was submitted with jquery.      
}else{
   //Else the user just clicked "next" and to continue normally.
}

我已经知道的:

使用$this->input->post('back')，我可以检查是否使用带有BACK的value的按钮提交了表单。我有var_dumped $this->input->post()，但它只返回输入字段的值。

就像上面的评论一样，我被要求发表我的评论作为答案，所以这里

if($this->input->post('back')){
//Tells me that the user clicked on the back button, and to go back 1 step in the wizard.    
}else if($_FILES['your_image_filed_name']){
//This is where I would like to say: if form was submitted with jquery.  
//you can use codeigniter's built in Upload libraray which v easy      
}else{
 //Else the user just clicked "next" and to continue normally.
 }

这里是upload代码，看看

   $config_logo_image = array(
    'allowed_types' => 'jpg|jpeg|gif|png',
    'upload_path' => UPLOAD_PATH,//root path for image
    'max_size' => 2000,
    );
$this->load->library('upload', $config_logo_image );                    
if($this->upload->do_upload('your_image_filed_name')){
$logo_image_data = $this->upload->data();
}