PHPMailer not sending file, only sending data, what's wrong?

Question

PHP

Good afternoon!
There are 2 sites, phpmailer is installed on them to send the form, the same file and settings, everything works on one site, and the photo comes to the mail, on the other, with the same settings and code, only data comes in, what's the catch?
The code is the same but works differently

<?php

require_once('phpmailer/PHPMailerAutoload.php');
$mail = new PHPMailer;
$mail->CharSet = 'utf-8';

$name = $_POST['user_name'];
$phone = $_POST['user_phone'];
$question = $_POST['user_question'];
$info = $_POST['user_info'];



//$mail->SMTPDebug = 3;                               // Enable verbose debug output


$mail->isSMTP();                                      // Set mailer to use SMTP
$mail->Host = 'mail.adm.tools';  																							// Specify main and backup SMTP servers
$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->Username = '????'; // Ваш логин от почты с которой будут отправляться письма
$mail->Password = '?????'; // Ваш пароль от почты с которой будут отправляться письма
$mail->SMTPSecure = 'ssl';                            // Enable TLS encryption, `ssl` also accepted
$mail->Port = 465; // TCP port to connect to / этот порт может отличаться у других провайдеров

$mail->setFrom('?????t'); // от кого будет уходить письмо?
$mail->addAddress('????');     // Кому будет уходить письмо
//$mail->addAddress('[email protected]');               // Name is optional
//$mail->addReplyTo('[email protected]', 'Information');
//$mail->addCC('[email protected]');
//$mail->addBCC('[email protected]');
//$mail->addAttachment('/var/tmp/file.tar.gz');         // Add attachments
$mail->addAttachment($_FILES['upload']['tmp_name'], $_FILES['upload']['name']);    // Optional name
$mail->isHTML(true);                                  // Set email format to HTML

$mail->Subject = 'Заявка с сайта GreenDream24';
$mail->Body    = '' .$name . ' оставил заявку, его телефон ' .$phone. '<br>Вопрос этого пользователя: ' .$question;
$mail->AltBody = '';

if(!$mail->send()) {
    echo 'Error';
} else {
    header('location: price-list-uspeh.html');
}


?>

Answer 1

First of all, you need to check if the file arrives on the server, then check whether it is saved in the temporary directory.
Try to send a file that is on the server. Perhaps it makes sense to save the file on the server and delete it if the upload was successful or after some time.
To solve the problem, you need to localize the problem.