var value=JSON.parse(value_from_HookerDB); //where HookerDb is a JSON Literal
foreach(var i in value) //that value is now an object
[/code] then u aleady understand what asynchronous coding is a function that runs in the nearby function with a callback,however shared hosting won’t allow you to install Node.JS on their server unless VPS or u’re rich enough to get a dedicated server, you can create mad app that deal with real time data computations like Online Ranking or Live Chatting or even Geo-location and getting co-ordinates and reflecting them in real time. yes PHP can do those but unless you have a better Host with lots of cash on hardwares NodeJS can do the same with limited resources. just thought i mention this out cuz not many developers use it, am eargly waiting for making offline javaScrip applications with NodeJS as Server.
for more info look at http://nodejs.org ciao.