我的Codeigniter 3应用程序中出现错误图像上传错误消息的原因是什么

Question

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。

除其他外，还有一个"编辑帐户信息"表单，其中有一个图像上传字段。在控制器中，update()方法包含图像上传操作的逻辑：

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'));
}
}

我遇到的(令人惊讶的(问题是，即使我正在上传图像，print_r($data['uerrors']);也会在浏览器中返回You did not select a file to upload.。

在视图中，返回相同的错误：

<?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(); ?>

考虑到我试图上传的图像大于指定的限制(100KB(，我预期的错误消息是：The file you are attempting to upload is larger than the permitted size。

我做错了什么？

Answer 1

试试这个

<?php echo form_open_multipart(base_url('dashboard/users/update')); ?>
<div class="form-group">
<input type="file" name="userfile" id="userfile" size="20">
<p><?php print_r($uerrors); ?></p>
</div>

Answer 2

尝试更改您的表单打开，从：

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

至

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

将表单编码类型从text/plain更改为multipart/form-data，以支持图像数据上传。以下是每种编码类型之间的区别。