Attach pdf to e-mail. Message doesn't work - php

Question

This php script works just fine sending my pdf file by e-mail.
The problem is the script doesn't send any message as specified in $mainMessage.
Why do that problem occur, with the script only sending the pdf file without any message?
// Settings
$name = "Name";
$email = "someome#anadress.com";
$to = "$name <$email>";
$from = "email#email.com";
$subject = "Here is your attachment";
$mainMessage = "Hi, here's the file.";
$fileatt = "test.pdf";
$fileatttype = "application/pdf";
$fileattname = "newname.pdf";
$headers = "From: $from";
// File
$file = fopen($fileatt, 'rb');
$data = fread($file, filesize($fileatt));
fclose($file);
// This attaches the file
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
$headers .= "\nMIME-Version: 1.0\n" .
"Content-Type: multipart/mixed;\n" .
" boundary=\"{$mime_boundary}\"";
$message = "This is a multi-part message in MIME format.\n\n" .
"-{$mime_boundary}\n" .
"Content-Type: text/plain; charset=\"iso-8859-1\n" .
"Content-Transfer-Encoding: 7bit\n\n" .
$mainMessage . "\n\n";
$data = chunk_split(base64_encode($data));
$message .= "--{$mime_boundary}\n" .
"Content-Type: {$fileatttype};\n" .
" name=\"{$fileattname}\"\n" .
"Content-Disposition: attachment;\n" .
" filename=\"{$fileattname}\"\n" .
"Content-Transfer-Encoding: base64\n\n" .
$data . "\n\n" .
"-{$mime_boundary}-\n";
// Send the email
if(mail($to, $subject, $message, $headers)) {
echo "The email was sent.";
}
else {
echo "There was an error sending the mail.";
}

Answer 1

Try using \r\n instead of your \ns. Also, I would suggest using a library for sending emails, such as PHPMailer or SwiftMailer, instead.
EDIT: There appears to be an extra (or missing) " when you declare your charset (at "Content-Type: text/plain; charset=\"iso-8859-1\n" - it outputs Content-Type: text/plain; charset="iso-8859-1).

Answer 2

you didn't notice that you need to complete this line:
$message = "This is a multi-part message in MIME format.\r\n" .
"--{$mime_boundary}\r\n" .
"Content-Type: text/plain; charset=utf-8 \r\n" .
"Content-Transfer-Encoding: 7bit\r\n" .
$mainMessage . "\r\n\r\n";
you are missing one "-" in "-{$mime_boundary}\r\n".
it should be as the example I wrote :3