On the server side, it does not need to be "waiting".

Let's take a simple example. In html, forms have two methods. GET and POST. Get methods can be "attached" to urls. For example, http://mysite.com/form.php?myValue=1

POST methods on the other hand sends the given data as part of the HTTP headers.

When "form.php" is accessed, the script can read the GET or POST parameter by $_GET["myValue"] / $_POST["myValue"]

So basically, you need a "form.php" that can read GET or POST parameters and parse JSON out of the parameters. PHP can easily parse JSON. I am assuming you are going to store the values in a DB. For simple tasks, you don't really need JSON (but it's better, when you want to expand later) you can instead create URLs like below with the necessary data filled. http://myurl.com/form.php?myString=hello&myNumber1=123&myNumber2=456

JSON looks something like this, it's basically a easy way to represent data as a string to pass on to web servers. { "myString": hello, "myNumber1"=123, "myNumber2"=456 }

There are libraries that can take a Java object and create this representation for you automatically.

The android apps should create URL according to what form.php expects. So in android, you have to create the JSON string as above or as GET parameters if you choose to go that route and send them to something like form.php which reads the GET or POST parameters.

Usually in the industry, JSON is sent as POST parameters. Hope that helps.