на локальном прикрепляется файл в форму, на удаленном нет

Вот ошибка:

Warning:  file_get_contents(): Filename cannot be empty in 
/home/host1449451/transkribator.ru/htdocs/form/post.php on line 44


$from = $_POST['email'];
$name = $_POST['name'];
$tel = $_POST['tel'];
$age = $_POST['age'];
$email = $_POST['email'];
$date = $_POST['date'];
$to = "***@yandex.ru";
$subject = "Пупкин";
$attachment = chunk_split(base64_encode(file_get_contents($_FILES['photo']
['tmp_name'])));
$filename = $_FILES['photo']['name'];
$filetype = $_FILES['photo']['type'];
$boundary = md5(date('r', time()));
$headers = "From: " . $email . "\r\n";
$headers .= "Reply-To: " . $email . "\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed; boundary=\"_1_$boundary\"";
$message="
--_1_$boundary
Content-Type: multipart/alternative; boundary=\"_2_$boundary\"
--_2_$boundary
Content-Type: text/plain; charset=\"utf-8\"
Content-Transfer-Encoding: 7bit
$message
--_2_$boundary--
--_1_$boundary
Content-Type: \"$filetype\"; name=\"$filename\"
Content-Transfer-Encoding: base64
Content-Disposition: attachment
$attachment
--_1_$boundary--";
 mail($to, $subject, $message, $headers);