Images in a database

Does anyone have or know of example code of an image being retrieved/inserted from/into a postgresql database using php. I know that performance will suffer but the load will be low and the number of images could be in the thousands so organisation is seen as more important than performance, storing images outside the database is a pure performance kludge. Has anyone done any form of quantifiable testing of the perf difference between the two methods and come up with rough performance hit guidelines. What I would like to do eventually is create a function in postgres to generate a thumbnail from the stored image that can be displayed. -- Ian Willis Unix Systems Administrator Department of Entomology CSIRO ph 02 62464391