我尝试过以下教程中的分步指南，但上传失败了： http://www.andrewrice.org/2012/03/creating-profile-pictures-with-codeigniter-and-tank-auth/
我已成功将tank-auth安装到我的codeigniter网站。请告诉我如何解决这个问题。谢谢。
**Profile Controller (/application/controllers/profile.php)**
function picture() {
/* Loads the Tank Auth "users" model, and assigns it the alias "foo" */
$this->load->model('tank_auth/users','foo');
/* Gets the logged-in user's ID, from preloaded Tank Auth library */
$user_id = $this->tank_auth->get_user_id();
/* Queries profile information for the user who's logged in ...
... including the profile pictures (see the table structure below) */
$data = $this->foo->get_profile_by_id($user_id);
/* Passes that data to the header, menu, form, and footer views */
$this->load->view('templates/header', $data);
$this->load->view('templates/menu', $data);
/* Loads the upload_form view */
$this->load->view('upload_form', array('error' => ' ' ));
$this->load->view('templates/footer', $data);
}
}
function do_upload() {
/* Upload Settings */
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '1024';
$config['max_width'] = '1024';
$config['width'] = '128';
$config['max_height'] = '768';
/* Encrypting helps prevent the file name from being discerned once its saved */
$config['encrypt_name'] = 'TRUE';
/* Load the CodeIgniter upload library, feed it the config from above */
$this->load->library('upload', $config);
/* Checks if the do_upload function has been successfully executed ...
... and if not, shows the upload form and any errors (if they exist) */
if (!$this->upload->do_upload()){
/* Loads the model (predefined database instructions, see below) ...
... and assigns it a nickname, I went with 'foo' */
$this->load->model('tank_auth/users','foo');
/* Makes the logged-in user's id a nice, clean variable */
$user_id = $this->tank_auth->get_user_id();
/* Use the model to gather all user profile information for that user_id */
$profile_data = (array) $this->foo->get_profile_by_id($user_id);
/* Pass that data into the data variable (for the views) */
$data = $profile_data;
/* Process errors if they exist */
$error = array('error' => $this->upload->display_errors());
/* Pass everything into the views */
$this->load->view('templates/header', $data);
$this->load->view('templates/menu', $data);
$this->load->view('upload_form', $error);
$this->load->view('templates/footer', $data);
/* ... if the file passes validation ... */
} else {
/* Load the users model, assign it alias 'foo' (or whatever you want) */
$this->load->model('tank_auth/users','foo');
/* Assign logged-in user ID to a nice, clean variable */
$user_id = $this->tank_auth->get_user_id();
/* Assign the upload's metadata (size, dimensions, destination, etc.) ...
... to an array with another nice, clean variable */
$upload = (array) $this->upload->data();
/* Assign's the user's profile data to yet another nice, clean variable */
$profile_data = (array) $this->foo->get_profile_by_id($user_id);
/* Uses two upload library features to assemble the file name (the name, and extension) */
$filename = $upload['raw_name'].$upload['file_ext'];
/* Same with the thumbnail we'll generate, but with the suffix '_thumb' */
$thumb = $upload['raw_name']."_thumb".$upload['file_ext'];
/* Set the rules for the upload */
$config['image_library'] = 'gd2';
$config['source_image'] = "./uploads/".$filename;
$config['create_thumb'] = TRUE;
$config['maintain_ratio'] = TRUE;
$config['width'] = 128;
$config['height'] = 128;
/* Load "image manipulation library", see CodeIgniter user guide */
$this->load->library('image_lib', $config);
/* Resize the image! */
$this->image_lib->resize();
/* Assign upload_data to $data variable */
$data['upload_data'] = $this->upload->data();
/* Assign profile_data to $data variable */
$data['profile_data'] = $profile_data;
/* Runs the users model (update_photo function, see below) and ...
... loads the location of the photo new photo into user's profile */
$this->foo->update_photo($user_id, $filename, $thumb);
/* Load "success" view with all the data! */
$this->load->view('upload_success', $data);
}
}
**The Upload Form View (/application/views/upload_form.php)**
<h1>Change Profile Picture</h1>
<?php echo $error;?>
<?php echo form_open_multipart('profile/do_upload');?>
<input type="file" name="userfile" size="20" />
<input type="submit" value="Upload New Picture" />undefined</form>
**User Model (/application/models/tank_auth/users.php)**
function update_photo($user_id, $filename, $thumb){
$this->db->where('user_id', $user_id);
$arr = array(
'photo'=> $filename,
'thumb' => $thumb
);
$this->db->update($this->profile_table_name, $arr);
}
**Displaying the Profile Picture (/application/views/menu.php)**
<div style='width: 128px; height:
<?php echo $size[1]; ?>px; margin-bottom: 10px; border: solid 1px #ccc; background: url("http://thc.fiu.edu/uploads/
<?php echo $thumb; ?>");'/>
<?php $size = getimagesize("http://www.yourwebsite.com/uploads/".$thumb); ?>
<a href="/profile/picture" class='editprofile' style="display: block; width: 128px; height:
<?php echo $size[1]; ?>px">
</a>
</div>