public function image($pathToImage)
    {

        /* compatibility if exif functions not available (--enable-exif) */
        if (!function_exists('exif_imagetype')) {
            function exif_imagetype($filename)
            {
                if ((list($width, $height, $type, $attr) = getimagesize($filename)) !== false) {
                    return $type;
                }

                return false;
            }
        }

        $val = @exif_imagetype($pathToImage);

        return in_array($val, array(IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG));
    }