Codeigniter 3应用程序中此错误图像上传错误消息的原因是什么？ [英] What is the cause of this wrong image upload error message in my Codeigniter 3 application?

问题描述

我正在使用 Codeigniter 3.1.8 和 Bootstrap 4 开发一个基本的博客应用程序。

I am working on a basic blog application with Codeigniter 3.1.8 and Bootstrap 4.

有是编辑帐户信息表格，其中有一个图片上传字段。在控制器中， update（）方法包含图像上载操作的逻辑：

There is, among others an "Edit account information" form, which has an image upload field. In the controller, the update() method contains the logic for the image upload action:

public function update() {
    // Only logged in users can edit user profiles
    if (!$this->session->userdata('is_logged_in')) {
        redirect('login');
    }

    $id = $this->input->post('id');

    $data = $this->Static_model->get_static_data();
    $data['pages'] = $this->Pages_model->get_pages();
    $data['categories'] = $this->Categories_model->get_categories();
    $data['author'] = $this->Usermodel->editAuthor($id);

    $this->form_validation->set_rules('first_name', 'First name', 'required');
    $this->form_validation->set_rules('last_name', 'Last name', 'required');
    $this->form_validation->set_rules('email', 'Email', 'required|trim|valid_email');

    $this->form_validation->set_error_delimiters('<p class="error-message">', '</p>');

    // Upload avatar
    $config['upload_path'] = './assets/img/avatars';
    $config['allowed_types'] = 'jpg|jpeg|png';
    $config['max_size'] = '100';

    $this->load->library('upload', $config);

        if (!$this->upload->do_upload('userfile')) {
            $uerrors = array('uerrors' => $this->upload->display_errors());
            $data['uerrors'] = $uerrors;
        }

    if(!$this->form_validation->run() || !empty($uerrors))
    {

        print_r($data['uerrors']);
        $this->load->view('partials/header', $data);
        $this->load->view('dashboard/edit-author');
        $this->load->view('partials/footer');
    } else
    {
        $this->Usermodel->update_user($id);
        $this->session->set_flashdata('user_updated', 'Your account details have been updated');
        redirect(base_url('/dashboard/manage-authors'));
    }
}

我的（令人惊讶的）问题是，即使虽然我正在上传图像，但 print_r（$ data ['uerrors']）; 返回您没有选择要上传的文件。在浏览器中。

The (surprising) problem I have is that, even though I am uploading an image, print_r($data['uerrors']); returns You did not select a file to upload. in the browser.

在视图中，返回相同的错误：

In the view, the same error is returned:

 <?php echo form_open(base_url('dashboard/users/update')); ?>

        <input type="hidden" name="id" id="uid" value="<?php echo $author->id; ?>">

        <div class="form-group <?php if(form_error('first_name')) echo 'has-error';?>">
          <input type="text" name="first_name" id="first_name" class="form-control" value="<?php echo set_value('first_name', $author->first_name); ?>" placeholder="First name">
          <?php if(form_error('first_name')) echo form_error('first_name'); ?> 
        </div>

        <div class="form-group <?php if(form_error('last_name')) echo 'has-error';?>">
          <input type="text" name="last_name" id="last_name" class="form-control" value="<?php echo set_value('last_name', $author->last_name); ?>" placeholder="Last name">
          <?php if(form_error('last_name')) echo form_error('last_name'); ?> 
        </div>

        <div class="form-group <?php if(form_error('email')) echo 'has-error';?>">
          <input type="text" name="email" id="email" class="form-control" value="<?php echo set_value('email', $author->email); ?>" placeholder="Email">
          <?php if(form_error('email')) echo form_error('email'); ?> 
        </div>

        <div class="form-group <?php if(form_error('bio')) echo 'has-error';?>">
          <textarea name="bio" id="bio" cols="30" rows="5" class="form-control" placeholder="Add a short bio"><?php echo set_value('bio', $author->bio); ?></textarea>
          <?php if(form_error('bio')) echo form_error('bio'); ?> 
        </div>

        <input type="hidden" name="avatar" id="avatar" value="<?php echo $author->avatar; ?>">
          <label for="avatar">Upload avatar</label>
          <div class="form-group">
            <input type="file" name="userfile" id="uavatar" size="20">
            <p><?php print_r($uerrors); ?></p>
          </div>

        <div class="form-group">
          <div class="w-50 pull-left pr-1">
            <input type="submit" value="Update" class="btn btn-block btn-md btn-success">
          </div>
          <div class="w-50 pull-right pl-1">
            <a href="<?php echo base_url('dashboard/users/edit/' . $author->id); ?>" class="btn btn-block btn-md btn-success">Cancel</a>
          </div>
        </div>          
<?php echo form_close(); ?>

我期望的错误消息，考虑到我尝试上传的图像大于指定的图像限制（100KB）为：您尝试上传的文件大于允许的大小。

The error message I was expecting, considering that the image I was trying to upload is larger then the specified limit (100KB) is: The file you are attempting to upload is larger than the permitted size.

什么是我做错了吗？

推荐答案

尝试更改表单的开头，从：

Try to change your form opening, from :

<?php echo form_open(base_url('dashboard/users/update')); ?>

至

<?php echo form_open_multipart(base_url('dashboard/users/update')); ?>

要从 text / plain 到 multipart / form-data 以支持图像数据上传。 此处是每种编码类型之间的区别。

To change the form encoding type from text/plain to multipart/form-data to support image data upload. Here is the difference between each encoding type.

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