มีปัญหาการแสดงผลวันที่ ที่ดึงจาก SQL Server 2008 ครับ ... Catchable fatal error: Object of class DateTime could not be converted to string in

$row['time'] = '2009-11-08 09:06:40';

$dt_obj = new DateTime($row['time'], new DateTimeZone('UTC')); 
echo 'UTC: ' . $dt_obj->format('Y-m-d H:i:s') . '<br />';  // 

$sql11 = "select top 1 CloseJob from Mt_Warranty";
$row11 = sqlsrv_query( $conn1, $sql11);
sqlsrv_fetch( $row11 );
$date = sqlsrv_get_field( $row11, 0, SQLSRV_PHPTYPE_STRING("UTF-8"));
echo $date."<br />";

$sql = "select top 1 CONVERT(varchar,CloseJob) as CloseJob  from Mt_Warranty";