images in databases & Flash via PHP

I was wondering - are there any good tutorials/examples of serving & updating images from a mySQL database via PHP? I assume this is possible, but I'm almost a newbie having not used PHP/mySQL for ages with some knowledge but would like to know more... Also now Flash MX can dynamically take JPEGs and MPEGs in 'dynamically' at runtime now, anyone combined this with PHP/mySQL to serve images? (I'd guess someone or many people have :-) I've done it from the Flash only side, loading variables and images/music, building modular duplicated movieclips etc. and want to do the next step which is to combine that with databases (I'm currently using text files, files on a webserver etc.) thanks Tim Baker