How to Send Emails with Arabic Content via PHP's Mail Function

How do I send emails with Arabic content via PHP's mail function?

Unfortunately, 8bit encoding is not reliable in e-mail. Many mail transport agents will remove the top bit of every byte in the mail body. بريد is "\xD8\xA8\xD8\xB1\xD9\x8A\xD8\xAF" in UTF-8 bytes; remove the top bit from those bytes and you get ASCII "X(X1Y\nX/".

The way to get non-ASCII characters into a mail body is to set Content-Transfer-Encoding to either base64 or quoted-printable, and the encode the body with base64_encode or quoted_printable_encode, respectively.

(quoted-printable is better if the mail is largely ASCII as it retains readability in the encoded form and is more efficient for ASCII. If the whole mail is Arabic, base64 would probably be the better choice.)

How do I send emails with arabic html content in php smtp

you can use PHPMailer Class

it is powerful , and open source .
for get examples please read this PHPMailer class examples

example for arabic , persian and etc.

<?php
require_once('class.phpmailer.php');
$mail = new PHPMailer(true);
$mail->IsSMTP();
try {
  $mail->Host       = "smtp.gmail.com";     
  $mail->SMTPAuth   = true;    
  $mail->SMTPSecure = "tls";  
  $mail->Port       = 587;      
  $mail->Username   = "yourname@gmail.com"; 
  $mail->Password   = "************";   
  $mail->AddReplyTo('yourname@example.com', 'Your Name');
  $mail->AddAddress('username@example.com', 'User Name'); 
  $mail->SetFrom('yourname@example.com', 'Your Name'); // 
  $mail->Subject = 'موضوع';
  $mail->AltBody = 'برنامه شما از این ایمیل پشتیبانی نمی کند، برای دیدن آن، لطفا از برنامه دیگری استفاده نمائید'; // متنی برای کاربرانی که نمی توانند ایمیل را به درستی مشاهده کنند
  $mail->CharSet = 'UTF-8';
  $mail->ContentType = 'text/html';
  $mail->MsgHTML('<html>
<body>
این یک <font color="#CC0000">تست</font> است!
</body>
</html>'); // متن پیام به صورت html
  //$mail->AddAttachment('images/phpmailer.gif'); // ضمیمه کردن فایل
  $mail->Send();
  echo "پیام با موفقیت ارسال شد\n";
} 
catch (phpmailerException $e) {
    echo $e->errorMessage();
} 
catch (Exception $e) {
    echo $e->getMessage();
}
?>

not able to send arabic email with good characters

you aren't specifying any Content-Type header so the recipient will use some default encoding
values appended to the $additional_headers parameter of the mail() function need to be properly sanitized (or users may inject additional headers)

Modified code (I assume the encoding is UTF-8):

$filterHeaderValue = function ($value) {
    return str_replace(array("\r", "\n"), '', trim($value));
};

$subject = $_POST['subject'];
$message = $_POST['message'] . "\n\n" . 'Regards, ' . $_POST['name'] . '.';
$headers =
    "Content-Type: text/plain; charset=UTF-8\r\n" 
    . 'From: ' . $filterHeaderValue($_POST['name']) . "\r\n"
    . 'Reply-To: ' . $filterHeaderValue($_POST['email']) . "\r\n"
    . 'X-Mailer: PHP/' . phpversion()
;

mail($to, $subject, $message, $headers);

if ($_POST['copy'] == 'on') {
    mail($_POST['email'], $subject, $message, $headers);
}

Php mail not sending arabic letters

As @Qirel said:

I'm not sure if ISO-8859-1 supports arabic, you might have to use
UTF-8 instead (and that means your entire code, including headers in
HTML/PHP/mail, should be set to UTF-8). I know UTF-8 supports it
anyway.

You can also check this post for confirmation.

PHP - Email with arabic characters

mb_internal_encoding("UTF-8");

$subject_evernote = mb_encode_mimeheader("العربية");