ThemeConfig::saveImage PHP Method

    public function saveImage($data)
    {
        // TODO インストール時にfilesの書き込み権限チェック＆フォルダ作成
        $saveDir = WWW_ROOT . 'files' . DS . 'theme_configs' . DS;
        $images = array('logo', 'main_image_1', 'main_image_2', 'main_image_3', 'main_image_4', 'main_image_5');
        $thumbSuffix = '_thumb';
        $old = $this->findExpanded();
        foreach ($images as $image) {
            if (!empty($data['ThemeConfig'][$image]['tmp_name'])) {
                @unlink($saveDir . $old[$image]);
                $pathinfo = pathinfo($old[$image]);
                @unlink($saveDir . $pathinfo['filename'] . $thumbSuffix . $pathinfo['extension']);
                $fileName = $data['ThemeConfig'][$image]['name'];
                $ext = pathinfo($fileName, PATHINFO_EXTENSION);
                $filePath = $saveDir . $image . '.' . $ext;
                $thumbPath = $saveDir . $image . $thumbSuffix . '.' . $ext;
                move_uploaded_file($data['ThemeConfig'][$image]['tmp_name'], $filePath);
                $Imageresizer = new Imageresizer();
                $Imageresizer->resize($filePath, $thumbPath, 320, 320);
                $data['ThemeConfig'][$image] = $image . '.' . $ext;
            } else {
                unset($data['ThemeConfig'][$image]);
            }
        }
        return $data;
    }