พอดีว่าเอา code upload ภาพมาแก้ แต่ว่าจะแก้ชื่อ folder เป็นตัวแปรยังไงครับ

class UploadHandler
{
    private $options;
    
    function __construct($options=null) {
        $this->options = array(
            'script_url' => $this->getFullUrl().'/'.basename(__FILE__),
            'upload_dir' => dirname(__FILE__).'/files1/',
            'upload_url' => $this->getFullUrl().'files1/',
            'param_name' => 'files',
            // The php.ini settings upload_max_filesize and post_max_size
            // take precedence over the following max_file_size setting:
            'max_file_size' => null,
            'min_file_size' => 1,
            'accept_file_types' => '/.+$/i',
            'max_number_of_files' => null,
            // Set the following option to false to enable non-multipart uploads:
            'discard_aborted_uploads' => true,
            // Set to true to rotate images based on EXIF meta data, if available:
            'orient_image' => false,
            'image_versions' => array(
                // Uncomment the following version to restrict the size of
                // uploaded images. You can also add additional versions with
                // their own upload directories:
                /*
                'large' => array(
                    'upload_dir' => dirname(__FILE__).'/files1/',
                    'upload_url' => dirname($_SERVER['PHP_SELF']).'/files1/',
                    'max_width' => 1920,
                    'max_height' => 1200
                ),
                */
                'thumbnail' => array(
                    'upload_dir' => dirname(__FILE__).'/thumbnails/',
                    'upload_url' => $this->getFullUrl().'/thumbnails/',
                    'max_width' => 80,
                    'max_height' => 80
                )
            )
        );