PHP send mail with question marks although using utf-8 - php

Question

Using the following php file to send mail.
But the text that is not English inside the mail body get as ???? and the $subject of the mail get as "‚º ëÃ"
what do I need to check/add/change in order to fix it?
<?php include('config.php');
header('Content-Type: text/html; charset=utf-8');
class messenger
{
public $name;
public $number;
public $email;
public $address;
public $category;
public $tool;
/*----------user registration start--------------*/
function signup()
{
$name = $_REQUEST['name'];
$number = $_REQUEST['number'];
$email = $_REQUEST['email'];
$address = $_REQUEST['address'];
$category = $_REQUEST['category'];
$tool = $_REQUEST['tool'];
$datetime = date("Y-m-d H:i:s");
//Generate the email message:
$to = 'someEmailAddress#gmail.com';
$subject = "הזמנת חדשה";
$msg = "In time: " . $datetime . "\n New Power Tool Rental: \n\n Name: " . $name . "\r\n Email: " . $email . "\n Mobile Number: " . $number . "\n Address: " . $address . "\n Category: " . $category . "\n Tool: " . $tool . "\n\n Regards\n " . $name . " \n " . $email;
$headers = "From: $email" . "\r\n";
$headers .= "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type: text/plain; charset=UTF-8";
$headers .= "X-Mailer: PHP/" . phpversion();
//Send the email
mail($to, $subject, $msg, $headers);
//Enter data to the SQL table
$sql = "INSERT INTO user (name, number, email, address, category, tool, dateTime)
VALUES ('$name', '$number', '$email', '$address', '$category', '$tool','$datetime')";
//Check if entered to SQL and if Yes send back in json message
$result = mysql_query($sql);
if (!$result) {
$message["result"] = "Problemmm";
} else {
$mysql_insert_id = mysql_insert_id(); //get the new ID number from sql table
$message["id"] = $mysql_insert_id; //add the new ID data to the response message
$message["name"] = $_REQUEST['name'];
$message["number"] = $_REQUEST['number'];
$message["email"] = $_REQUEST['email'];
$message["address"] = $_REQUEST['address'];
$message["result"] = "successfully";
}
//Send back the json message
echo json_encode($message);
die;
}
/*----------user registration end--------------*/
}
?>
just tried to change the subject to:
$subject = "הזמנת כלי להשכרה";
$encSubject = '=?UTF-8?B?'.base64_encode($subject).'?=';
now I get the subject of the mail as:
���ú ��é ��

Answer 1

Setting the headers is not enough.
Both subject (must be RFC 2047) and
message (must be UTF-8 in your case) have also be in their respecive correct encoding, the php::mail doc + user-notes covers most of what you miss.