gistfile1.php

// Send HTTP Response Method
function sendResponse($status, $body = '')
{
    $status_header = 'HTTP/1.1 ' . $status;
    header($status_header);
    header('Content-type: application/json');
    echo $body;
}

// Calling the HTTP Response Method with parameters
sendResponse(200, json_encode(array(
                'username' => $username,
                'token'    => $token
            )));