Question

大家好，我最近设法将图片上传到我的个人资料页面，但是当我刷新页面时图像消失了。我认为这是因为图像被放入数据库的方式。

这是模特：

function ProfileImages()
{
    parent::__construct();

}

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($username)
{
    $this->db->select('*')->from('profileimages')->where('user', $username);
    $query = $this->db->get();
    if ($query->num_rows() > 0){
        $row = $query->row();
        return $row->profileimage;
    }

    return Null;


}

   }

这是我的控制器：

class HomeProfile extends CI_Controller 
 {


function HomeProfile()
  {
   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');
$this->profileimages->putProfileImage($username, $this->input->post("profileimage"));
//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


    $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');

    $data['profileimages'] = $this->profileimages->getProfileImage($username);


    $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');

$data['profileimages'] = $this->profileimages->getProfileImage($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/upload_form', $data);
$this->load->view('homeprofile/homeprofileview', $data, $viewData, array('error' => ' ' ) );
$this->load->view('shared/footer');
   }

  }

如果你看一下模型中的putprofileimages函数，我想我会在这里放一个附加命令。我希望图像的文件名出现在profileimage字段的db中。我也希望刷新时，个人资料图片会留在屏幕上

<h3><?="Profile Image"?></h3>
 <img src="<?php if (isset($img)) echo base_url($img); ?>" width='300' height='300'/>
  <?=form_open_multipart('homeprofile/upload');?>
    <input type="file" name="userfile" value=""/>
    <?=form_submit('submit', 'upload')?>
    <?=form_close();?> 
    <?php if (isset($error)) echo $error;?>
  </div> 
</div>  
   <div id="secondary">
  <p>
      <?=$profileText;?>
    </p>
    <p>
      <?=form_open('homeprofile/changetext'); ?>
      <?php $msgbox = array(
            'name' => 'profiletext',
            'rows' => '8',
            'cols' => '30',
            );?>
     <?=form_textarea($msgbox);?>       
     </p>
     <p>
      <?=form_submit('submit', 'Change'); ?>
      <?=form_close(); ?>
    </p>
</div>

Answer 1

您可以像在char字段中一样只保存数据库中的图像名称。在do_upload功能之后，您可以使用$this->upload->file_name

检索图像名称

然后您可以轻松地将其保存在数据库中，而不是整个文件中。

现在，在您的视图页面中，您可以通过html设置图像路径，然后仅使用从db查询中获取的文件名。

Answer 2

一个简单说明 - 您使用的是codeigniter 2吗？你应该这样设置你的构造函数：

 class HomeProfile extends CI_Controller 
 {

 function __construct()
{
    // Call the parent construct
    parent::__construct();

$this->load->model("profiles");
$this->load->model("profileimages");
$this->load->helper(array('form', 'url'));      

 } // end construct

对于模特来说也一样！好吧你的模特，也许我没有得到这个，但你有

 if ($this->exists($username))

但你的方法说

 function putProfileImage($username, $img)

因此，如果用户名可能为空，则只需设置默认值

即可

function putProfileImage($username = 0, $img)

那么也许你可以做到

 if ($username === 0)

但我个人不会在相同的方法中插入和更新，拆分它们，将更容易调试。还 - 你是否在autoload中加载了会话库???

如何将我的模型调整为存储上传的图像到我的数据库作为图像的链接而不是显示为blob？

2 个答案: