PHP mass mail script shows extra file in outlook - php

Question

I use PHP script to send email with multiple attachments, it works great for gmail, but in Microsoft Outlook i also see blank file ATT00010.txt (random numbers.) as attachment. And when i send email from outlook with multiple attachments as well it does not show no file like this.
I echo'ed output from email script and there is no such file in code. Can someone tell me how to remove this file from outlook?
Email script is below.
// array with filenames to be sent as attachment
$files = array("file_1.ext","file_2.ext","file_3.ext",......);
// email fields: to, from, subject, and so on
$to = "mail#mail.com";
$from = "mail#mail.com";
$subject ="My subject";
$message = "My message";
$headers = "From: $from";
// boundary
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
// headers for attachment
$headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"{$mime_boundary}\"";
// multipart 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" . $message . "\n\n";
$message .= "--{$mime_boundary}\n";
// preparing attachments
for($x=0;$x<count($files);$x++){
$file = fopen($files[$x],"rb");
$data = fread($file,filesize($files[$x]));
fclose($file);
$data = chunk_split(base64_encode($data));
$message .= "Content-Type: {\"application/octet-stream\"};\n" . " name=\"$files[$x]\"\n" .
"Content-Disposition: attachment;\n" . " filename=\"$files[$x]\"\n" .
"Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
$message .= "--{$mime_boundary}\n";
}
// send
$ok = #mail($to, $subject, $message, $headers);
if ($ok) {
echo "<p>mail sent to $to!</p>";
} else {
echo "<p>mail could not be sent!</p>";
}

Answer 1

If you want something that's a little less of a pain to use and send attachments with, try Swift Mailer. (swiftmailer.org) I've been using it in my projects and it works great.
Here's an example:
$message = Swift_Message::newInstance()
->setSubject('Webinar Registration')
->setFrom(array('replyto#example.org' => 'From Name'))
->setTo(array('destination#example.org'))
->setBody($MESSAGE_TEXT)
;
$message->attach(Swift_Attachment::fromPath('SOME_FILE_PATH'));
$transport = Swift_SmtpTransport::newInstance('127.0.0.1', 25);
$mailer = Swift_Mailer::newInstance($transport);
$result = $mailer->send($message);
Just my two cents.
Otherwise, I was going to mention what someone else already beat me to -- check the boundaries.

Answer 2

The last boundary line in a multipart/* message must have -- appended at the end, in addition to what all of the other boundary lines have. A consumer can use that to recognize the end of a message.
Apparently Outlook treats the absence of the correct ending as an indication that the message has been truncated, and then does the best it can to display whatever it did receive.

Answer 3

Its my second account, i actually found solution and don't need no library or class at all although i might turn this into class and add some stuff, its always better to have full understanding of process not just from, to, files etc fields.
Solution is simple here just replace last part with
if ($x == count($files)-1)
$message .= "--{$mime_boundary}--\r\n";
else
$message .= "--{$mime_boundary}\n";
\r is not necessary
if you just put -- it will use it many times inside loop IF checks if this is last loop.