getUploadedFileExtension() public method

public getUploadedFileExtension ( ) : mixed
return mixed
 /**
  *
  *
  * @param PostController $Sender
  * @param array $Args
  */
 public function postController_editorUpload_create($Sender, $Args = array())
 {
     // @Todo Move to a library/functions file.
     require 'generate_thumbnail.php';
     // Grab raw upload data ($_FILES), essentially. It's only needed
     // because the methods on the Upload class do not expose all variables.
     $fileData = Gdn::request()->getValueFrom(Gdn_Request::INPUT_FILES, $this->editorFileInputName, false);
     $discussionID = $Sender->Request->post('DiscussionID') ? $Sender->Request->post('DiscussionID') : '';
     // JSON payload of media info will get sent back to the client.
     $json = array('error' => 1, 'feedback' => 'There was a problem.', 'errors' => array(), 'payload' => array());
     // New upload instance
     $Upload = new Gdn_Upload();
     // This will validate, such as size maxes, file extensions. Upon doing
     // this, $_FILES is set as a protected property, so all the other Gdn_Upload methods work on it.
     $tmpFilePath = $Upload->validateUpload($this->editorFileInputName);
     // Get base destination path for editor uploads
     $this->editorBaseUploadDestinationDir = $this->getBaseUploadDestinationDir();
     // Pass path, if doesn't exist, will create, and determine if valid.
     $canUpload = Gdn_Upload::canUpload($this->editorBaseUploadDestinationDir);
     if ($tmpFilePath && $canUpload) {
         $fileExtension = strtolower($Upload->getUploadedFileExtension());
         $fileName = $Upload->getUploadedFileName();
         list($tmpwidth, $tmpheight, $imageType) = getimagesize($tmpFilePath);
         // This will return the absolute destination path, including generated
         // filename based on md5_file, and the full path. It
         // will create a filename, with extension, and check if its dir can be writable.
         $absoluteFileDestination = $this->getAbsoluteDestinationFilePath($tmpFilePath, $fileExtension);
         // Save original file to uploads, then manipulate from this location if
         // it's a photo. This will also call events in Vanilla so other plugins can tie into this.
         if (empty($imageType)) {
             $filePathParsed = $Upload->saveAs($tmpFilePath, $absoluteFileDestination, array('source' => 'content'));
         } else {
             $filePathParsed = Gdn_UploadImage::saveImageAs($tmpFilePath, $absoluteFileDestination, '', '', array('SaveGif' => true));
             $tmpwidth = $filePathParsed['Width'];
             $tmpheight = $filePathParsed['Height'];
         }
         // Determine if image, and thus requires thumbnail generation, or simply saving the file.
         // Not all files will be images.
         $thumbHeight = '';
         $thumbWidth = '';
         $imageHeight = '';
         $imageWidth = '';
         $thumbPathParsed = array('SaveName' => '');
         $thumbUrl = '';
         // This is a redundant check, because it's in the thumbnail function,
         // but there's no point calling it blindly on every file, so just check here before calling it.
         $generate_thumbnail = false;
         if (in_array($fileExtension, array('jpg', 'jpeg', 'gif', 'png', 'bmp', 'ico'))) {
             $imageHeight = $tmpheight;
             $imageWidth = $tmpwidth;
             $generate_thumbnail = true;
         }
         // Save data to database using model with media table
         $Model = new Gdn_Model('Media');
         // Will be passed to model for database insertion/update. All thumb vars will be empty.
         $Media = array('Name' => $fileName, 'Type' => $fileData['type'], 'Size' => $fileData['size'], 'ImageWidth' => $imageWidth, 'ImageHeight' => $imageHeight, 'ThumbWidth' => $thumbWidth, 'ThumbHeight' => $thumbHeight, 'InsertUserID' => Gdn::session()->UserID, 'DateInserted' => date('Y-m-d H:i:s'), 'StorageMethod' => 'local', 'Path' => $filePathParsed['SaveName'], 'ThumbPath' => $thumbPathParsed['SaveName']);
         // Get MediaID and pass it to client in payload.
         $MediaID = $Model->save($Media);
         $Media['MediaID'] = $MediaID;
         if ($generate_thumbnail) {
             $thumbUrl = url('/utility/mediathumbnail/' . $MediaID, true);
         }
         $payload = array('MediaID' => $MediaID, 'Filename' => htmlspecialchars($fileName), 'Filesize' => $fileData['size'], 'FormatFilesize' => Gdn_Format::bytes($fileData['size'], 1), 'type' => $fileData['type'], 'Thumbnail' => '', 'FinalImageLocation' => '', 'Parsed' => $filePathParsed, 'Media' => (array) $Media, 'original_url' => $Upload->url($filePathParsed['SaveName']), 'thumbnail_url' => $thumbUrl, 'original_width' => $imageWidth, 'original_height' => $imageHeight);
         $json = array('error' => 0, 'feedback' => 'Editor received file successfully.', 'payload' => $payload);
     }
     // Return JSON payload
     echo json_encode($json);
 }