class to generate Javascript Object ??

I wrote a php class to generate flowplayer/html5 media code for my site: http://www.shastaherps.org/xml_MMmediaClass.phps The "buildFlashvars()" function in it is really ugly and will be a pain to update as I modify the class in the future. What it does is generate a JavaScript object string, as described here: http://flowplayer.org/tools/flashembed.html I'm thinking (hoping) there is already a php class somewhere for generating JavaScript object strings that I can instead of my ugly easily breakable way of doing it. Anyone know of one?