我已经对这个问题提出了一些问题，但我最终并没有真正取得太大进展。我正在尝试将图像上传到页面上，并让文件名出现在用户名旁边的数据库中，但它一直显示为零。为什么会这样？图像字段是一个 varchar，因此它将保存文件名。但既然我希望我的 getProfileImage 函数将图像显示回屏幕，它应该是一个 blob 吗？
这是我的控制器：
function __construct()
{
// Call the parent construct
parent::__construct();
$this->load->model("profiles");
$this->load->model("profileimages");
$this->load->helper(array('form', 'url'));
}
function upload()
{
$config = array(
'allowed_types' =>'gif|jpg|jpeg|png',
'upload_path' =>'./web-project-jb/assets/puploads/',
'max_size' => 10000,
'max_width' => 1024,
'max_height' => 768
);
$this->load->library('upload', $config);
$img = $this->session->userdata('img');
$username = $this->session->userdata('username');
//fail show upload form
if (! $this->upload->do_upload())
{
$error = array('error'=>$this->upload->display_errors());
$username = $this->session->userdata('username');
$viewData['username'] = $username;
$viewData['profileText'] = $this->profiles->getProfileText($username);
$this->load->view('shared/header');
$this->load->view('homeprofile/homeprofiletitle', $viewData);
$this->load->view('shared/nav');
$this->load->view('homeprofile/homeprofileview', $error, $viewData, array('error' => ' ' ));
$this->load->view('shared/footer');
//redirect('homeprofile/index');
}
else
{
//successful upload so save to database, which it doesn't
$file_data = $this->upload->data();
$data['img'] = '/web-project-jb/assets/puploads/'.$file_data['file_name'];
// you may want to delete the image from the server after saving it to db
// check to make sure $data['full_path'] is a valid path
// get upload_sucess.php from link above
//$image = chunk_split( base64_encode( file_get_contents( $data['file_name'] ) ) );
$this->username = $this->session->userdata('username');
$this->profileimages->putProfileImage($username, $img);
$data['profileimages'] = $this->profileimages->getProfileImage($username, $img);
$viewData['username'] = $username;
$viewData['profileText'] = $this->profiles->getProfileText($username);
$username = $this->session->userdata('username');
$this->load->view('shared/header');
$this->load->view('homeprofile/homeprofiletitle', $viewData);
$this->load->view('shared/nav');
$this->load->view('homeprofile/homeprofileview', $data, $viewData);
$this->load->view('shared/footer');
//redirect('homeprofile/index');
}
}
function index()
{
$username = $this->session->userdata('username');
$img = $this->session->userdata('img');
$data['profileimages'] = $this->profileimages->getProfileImage($username, $img);
$viewData['username'] = $username;
$viewData['profileText'] = $this->profiles->getProfileText($username);
$this->load->view('shared/header');
$this->load->view('homeprofile/homeprofiletitle', $viewData);
$this->load->view('shared/nav');
//$this->load->view('homeprofile/upload_form', $data);
$this->load->view('homeprofile/homeprofileview', $data, $viewData, array('error' => ' ' ) );
$this->load->view('shared/footer');
}
}
我的模型：
var $proimage_path;
function ProfileImages()
{
parent::__construct();
$this->proimage_path = 'web-project-jb/assets/puploads';
}
function exists($username)
{
$this->db->select('*')->from("profileimages")->where('user', $username);
$query = $this->db->get();
if ($query->num_rows() > 0)
{
return true;
/*
echo "user $user exists!";
$row = $query->row();
echo " and his profileimage is $row->profileimage";
*/
}
else
{
return false;
//echo "no such user as $user!";
}
}
function putProfileImage($username, $img)
{
$record = array('user' => $username, 'profileimage' => $img);
if ($this->exists($username))
{
$this->db->where('user', $username)->update('profileimages', $record);
}
else
{
$this->db->where('user', $username)->insert('profileimages', $record);
}
}
function getProfileImage($img)
{
$this->db->select('*')->from('profileimages')->where('profileimage', $img);
$query = $this->db->get();
if ($query->num_rows() > 0){
$row = $query->row();
return $row->profileimage;
}
return $img;
}
}