GdThumb::save PHP 메소드

    public function save($fileName, $format = null)
    {
        $validFormats = array('GIF', 'JPG', 'PNG');
        $format = $format !== null ? strtoupper($format) : $this->format;
        if (!in_array($format, $validFormats)) {
            throw new InvalidArgumentException('Invalid format type specified in save function: ' . $format);
        }
        // make sure the directory is writeable
        if (!is_writable(dirname($fileName))) {
            // try to correct the permissions
            if ($this->options['correctPermissions'] === true) {
                @chmod(dirname($fileName), 0777);
                // throw an exception if not writeable
                if (!is_writable(dirname($fileName))) {
                    throw new RuntimeException('File is not writeable, and could not correct permissions: ' . $fileName);
                }
            } else {
                throw new RuntimeException('File not writeable: ' . $fileName);
            }
        }
        switch ($format) {
            case 'GIF':
                imagegif($this->oldImage, $fileName);
                break;
            case 'JPG':
                imagejpeg($this->oldImage, $fileName, $this->options['jpegQuality']);
                break;
            case 'PNG':
                imagepng($this->oldImage, $fileName);
                break;
        }
        return $this;
    }

 protected function _writeResized(GdThumb $resized, $type = null)
 {
     $resized->save($this->getOutputPath(), $type);
     return $this->getOutputPath();
 }