Gdn_Upload::generateTargetName PHP Méthode

    public function generateTargetName($TargetFolder, $Extension = 'jpg', $Chunk = false)
    {
        if (!$Extension) {
            $Extension = trim(pathinfo($this->_UploadedFile['name'], PATHINFO_EXTENSION), '.');
        }
        do {
            if ($Chunk) {
                $Name = randomString(12);
                $Subdir = sprintf('%03d', mt_rand(0, 999)) . '/';
            } else {
                $Name = randomString(12);
                $Subdir = '';
            }
            $Path = "{$TargetFolder}/{$Subdir}{$Name}.{$Extension}";
        } while (file_exists($Path));
        return $Path;
    }

 /**
  * Banner management screen.
  *
  * @since 2.0.0
  * @access public
  */
 public function banner()
 {
     $this->permission('Garden.Community.Manage');
     $this->addSideMenu('dashboard/settings/banner');
     $this->title(t('Banner'));
     $Validation = new Gdn_Validation();
     $ConfigurationModel = new Gdn_ConfigurationModel($Validation);
     $ConfigurationModel->setField(array('Garden.HomepageTitle' => c('Garden.Title'), 'Garden.Title', 'Garden.Description'));
     // Set the model on the form.
     $this->Form->setModel($ConfigurationModel);
     // Get the current logo.
     $Logo = c('Garden.Logo');
     if ($Logo) {
         $Logo = ltrim($Logo, '/');
         // Fix the logo path.
         if (stringBeginsWith($Logo, 'uploads/')) {
             $Logo = substr($Logo, strlen('uploads/'));
         }
         $this->setData('Logo', $Logo);
     }
     // Get the current mobile logo.
     $MobileLogo = c('Garden.MobileLogo');
     if ($MobileLogo) {
         $MobileLogo = ltrim($MobileLogo, '/');
         // Fix the logo path.
         if (stringBeginsWith($MobileLogo, 'uploads/')) {
             $MobileLogo = substr($MobileLogo, strlen('uploads/'));
         }
         $this->setData('MobileLogo', $MobileLogo);
     }
     // Get the current favicon.
     $Favicon = c('Garden.FavIcon');
     $this->setData('Favicon', $Favicon);
     $ShareImage = c('Garden.ShareImage');
     $this->setData('ShareImage', $ShareImage);
     // If seeing the form for the first time...
     if (!$this->Form->authenticatedPostBack()) {
         // Apply the config settings to the form.
         $this->Form->setData($ConfigurationModel->Data);
     } else {
         $SaveData = array();
         if ($this->Form->save() !== false) {
             $Upload = new Gdn_Upload();
             try {
                 // Validate the upload
                 $TmpImage = $Upload->validateUpload('Logo', false);
                 if ($TmpImage) {
                     // Generate the target image name
                     $TargetImage = $Upload->generateTargetName(PATH_UPLOADS);
                     $ImageBaseName = pathinfo($TargetImage, PATHINFO_BASENAME);
                     // Delete any previously uploaded images.
                     if ($Logo) {
                         $Upload->delete($Logo);
                     }
                     // Save the uploaded image
                     $Parts = $Upload->SaveAs($TmpImage, $ImageBaseName);
                     $ImageBaseName = $Parts['SaveName'];
                     $SaveData['Garden.Logo'] = $ImageBaseName;
                     $this->setData('Logo', $ImageBaseName);
                 }
                 $TmpMobileImage = $Upload->validateUpload('MobileLogo', false);
                 if ($TmpMobileImage) {
                     // Generate the target image name
                     $TargetImage = $Upload->generateTargetName(PATH_UPLOADS);
                     $ImageBaseName = pathinfo($TargetImage, PATHINFO_BASENAME);
                     // Delete any previously uploaded images.
                     if ($MobileLogo) {
                         $Upload->delete($MobileLogo);
                     }
                     // Save the uploaded image
                     $Parts = $Upload->saveAs($TmpMobileImage, $ImageBaseName);
                     $ImageBaseName = $Parts['SaveName'];
                     $SaveData['Garden.MobileLogo'] = $ImageBaseName;
                     $this->setData('MobileLogo', $ImageBaseName);
                 }
                 $ImgUpload = new Gdn_UploadImage();
                 $TmpFavicon = $ImgUpload->validateUpload('Favicon', false);
                 if ($TmpFavicon) {
                     $ICOName = 'favicon_' . substr(md5(microtime()), 16) . '.ico';
                     if ($Favicon) {
                         $Upload->delete($Favicon);
                     }
                     // Resize the to a png.
                     $Parts = $ImgUpload->SaveImageAs($TmpFavicon, $ICOName, 16, 16, array('OutputType' => 'ico', 'Crop' => true));
                     $SaveData['Garden.FavIcon'] = $Parts['SaveName'];
                     $this->setData('Favicon', $Parts['SaveName']);
                 }
                 $TmpShareImage = $Upload->ValidateUpload('ShareImage', false);
                 if ($TmpShareImage) {
                     $TargetImage = $Upload->GenerateTargetName(PATH_UPLOADS, false);
                     $ImageBaseName = pathinfo($TargetImage, PATHINFO_BASENAME);
                     if ($ShareImage) {
                         $Upload->delete($ShareImage);
                     }
                     $Parts = $Upload->SaveAs($TmpShareImage, $ImageBaseName);
                     $SaveData['Garden.ShareImage'] = $Parts['SaveName'];
                     $this->setData('ShareImage', $Parts['SaveName']);
                 }
             } catch (Exception $ex) {
                 $this->Form->addError($ex);
             }
             // If there were no errors, save the path to the logo in the config
             if ($this->Form->errorCount() == 0) {
                 saveToConfig($SaveData);
             }
             $this->informMessage(t("Your settings have been saved."));
         }
     }
     $this->render();
 }