Question

I want to send data from my Android app to my server.
On the client-side, meaning the application,I can create the JSON object and send it to the server.
The problem is, I don’t know how to ‘handle’ it on the server side.All I want my server to do is to receive the JSON, parse it, and show it to me.That’s it.

I know it’s pretty vague question, but I don’t really know where to start here, and would love if anyone could show me a complete tutorial.

Thanks!

Answer 1

Use PHP and json_decode()
http://php.net/manual/en/function.json-decode.php

Here a quick example how to handle the data:

        // get json
        $input = json_decode($_GET["json"]);

        // get values
        $firstname = $input->firstName;
        $surename = $input->lastName;
        $age = intval($input->age);

        // check values
        if (isset($firstname) && !empty($firstname) && 
            isset($surename) && !empty($surename) &&
            isset($age) && is_numeric($age))
        {
            // do something
            echo "Hello ".htmlspecialchars($firstname)." ".htmlspecialchars($surename)."!<br>";
            echo "You are $age years old! Wow.";
        }
        else
        {
            echo "Some values are missing or incorrect";
        }

I used the GET parameter in this example. If you have larger data, use POST instead of GET.

Example:
URL: http://localhost/test/index.php?json={ “firstName” : “John”,”lastName” : “Doe”,”age” : 23 }
Output: Hello John Doe!
You are 23 years old! Wow.

But: Make sure you encode the JSON data at your application. In my example the browser does it.