Image manipulation in PHP

This project is to work on a current website (all details available via pm). I require a script writing to rotate images automatically. Ie from portrait to landscape and to create a thumbnail image of the same. Also work on small bug in php (details on request). Payment are via GAF and 100% will be paid via escrow payment upon successful bid. Also existing website files will be supplied (as required)Along with any data needed. All script is currently in php.