Photogallery with features in php + DB

Dear friends, we would like to implement a photogallery where the users can upload some photographs,and then can rotate them. The photographs are stored in a temporary area waiting for approval. The system then performs the following operations 1)reduces the size of the photograph so that the largest edge is x 2)generates thumbnail for each photograph There should finally be an administrator login, which enables to authorise publication and to perform operations like rotating the photographs which are wrong. Do you know of any php based application, function, set of classes for implementing this features? -- symbulos partners -.- symbulos - ethical services for your organisation http://www.symbulos.com