here is some information about the functions
if you want to get the pattemplate you can go to : http://www.php-tools.net
and about the thumbnail.php file you can get the full file from : http://www.awddesign.co.uk/resources/freephp/index.php?cat_select=Mixed_php&show=GD2thumbnail_class

and by the way i have removed some fuctions from it so it come much more better to do what i need.