Via freshmeat, I spotted MMSlib this afternoon:
Mmslib is a PHP library for encoding and decoding MMS:es. MMS is short for Multimedia Messaging Service. In short it is the successor of SMS (Short Message Service) with the enhancements that you can not only send text but basically any content type your phone can handle such as images, text, videos, ring signals and audio clips.
I’m going to file this one away for a rainy day when I’m hacking on code at three in the morning and need to deal with MMSes in a LAMP environment. This looks like a great little library.