Let's begin with the price calculator. It's very simple.
First, create a completely new php file called 'get.php'.
In that file, start your PHP tags normally.
Then create a variable like so:
$json_response = file_get_contents('http://www.blockchain.info/ticker');
echo $json_response;
So here's the code for 'get.php'
$json_response = file_get_contents('http://www.blockchain.info/ticker');
echo $json_response;
?>
In your main file's section, include the latest jQuery build.
At the bottom of your tag, open a