[myserver]
    host = myhost
    port = myport

function getConnection() {
   $dbhost="myserver.database.windows.net";
   $dbuser="user";
   $dbpass="mypass";
   $dbname="myDB";
   $dbh = new PDO("dblib:host=$dbhost;dbname=$dbname", $dbuser, $dbpass);
   $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
   return $dbh;
}

$app = new SlimApp();

$app->get('/clients', 'getClients');

$app->run();

function getClients() {
$sql = "select * FROM mytable";

try {
    $db = getConnection();
    $stmt = $db->query($sql);
    $clients = $stmt->fetchAll(PDO::FETCH_OBJ);
    $db = null;
    echo '{"client": ' . json_encode($clients) . '}';
} catch(PDOException $e) {
    echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}