The EasyPHPWebsites site has posted the next tutorial in their series looking at combining PHP and Ajax to make more powerful applications. In this new article they look at the combination of PHP and jQuery as connected by JSON messages.
The jQuery/JSON "glue" is one alternative and the option he explores. He briefly introduces JSON and its format before getting into the jQuery use of it or the PHP code behind it. Thankfully, PHP has a handy function to make things easier for the developer - the json_encode and json_decode functions.