$url = "https://jsonblob.com/api/jsonBlob/b80b1b40-77a7-11e9-8a3e-4b473af1ffc6";

$dat = file_get_contents($url);

$d = json_decode($dat,true);


$_GET["name"];

$calcul = $_GET['name']/$d['usd'] ;

$obj = (object)[
    'usd' => "$calcul"
];