PHPMailer shows weird character [duplicate] - php

Question

My code works but when I send an Email I see this long block on informations that starts like this:
2021-03-06 13:42:26 CLIENT -> SERVER: EHLO localhost
2021-03-06 13:42:26 CLIENT -> SERVER: STARTTLS
2021-03-06 13:42:27 CLIENT -> SERVER: EHLO localhost
2021-03-06 13:42:27 CLIENT -> SERVER: AUTH LOGIN
2021-03-06 13:42:27 CLIENT -> SERVER: [credentials hidden]
2021-03-06 13:42:27 CLIENT -> SERVER: [credentials hidden]
...and goes on writing al the informations about PHPMailer.
I don't want everyone to see it after they send an Email, how can I hide it?
that's my code:
if($errore == 0){
$message_email = 'Messaggio inviato da: '.$name.' '.$surname.'<br>';
$message_email .= 'Email: '.$email.'<br>';
$message_email .= 'Telefono: '.$number.'<br>';
$message_email .= 'Oggetto: '.$object.'<br>';
$message_email .= 'Corpo: '.$message.'<br>';
require 'PHPMailer.php';
require 'Exception.php';
require 'SMTP.php';
$mail = new \PHPMailer\PHPMailer\PHPMailer();
$mail->IsSMTP();
$mail->Mailer = "smtp";
$mail->SMTPDebug = 1;
$mail->SMTPAuth = TRUE;
$mail->SMTPSecure = "tls";
$mail->Port = 587;
$mail->Host = "smtp.gmail.com";
$mail->Username = "myemail#gmail.com";
$mail->Password = "mypass";
$mail->IsHTML(true);
$mail->setFrom('bibibibi#gmail.com');
$mail->addAddress('lalala#gmail.com');
$mail->msgHtml($messaggio_email);
$mail->Subject = $object;
if(!$mail->Send()) {
echo "something went wrong";
var_dump($mail);
} else {
echo 'Email sent';
}

Answer 1

You need to change the "SMTP class debug output mode." using the SMTPDebug property.
$mail->SMTPDebug = SMTP::DEBUG_OFF;
Your actual value (1) corresponding to DEBUG_CLIENT.
But you should use one of the following allowed values :
SMTP::DEBUG_OFF: No output
SMTP::DEBUG_CLIENT: Client messages
SMTP::DEBUG_SERVER: Client and server messages
SMTP::DEBUG_CONNECTION: As SERVER plus connection status
SMTP::DEBUG_LOWLEVEL: Noisy, low-level data output, rarely needed