php mail() with attachment returns noname.txt - php

Question

I am using php mail() function with attachment using Content-Type: multipart/mixed header but it always return noname.txt
Here is my codes:
$upload_name=$_FILES["upload"]["name"];
$upload_type=$_FILES["upload"]["type"];
$upload_size=$_FILES["upload"]["size"];
$upload_temp=$_FILES["upload"]["tmp_name"];
$subject = "Subject";
$to="example#example.com";
$message="message";
$fp = fopen($upload_temp, "rb");
$file = fread($fp, $upload_size);
$file = chunk_split(base64_encode($file));
$num = md5(time());
//Normal headers
$headers = "From: Info Mail<example#example.com>\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed; ";
$headers .= "boundary=".$num."\r\n";
$headers .= "--$num\r\n";
// This two steps to help avoid spam
$headers .= "Message-ID: <".gettimeofday()." TheSystem#".$_SERVER['SERVER_NAME'].">\r\n";
$headers .= "X-Mailer: PHP v".phpversion()."\r\n";
// With message
$headers .= "Content-Type: text/html; charset=iso-8859-1\r\n";
$headers .= "Content-Transfer-Encoding: 8bit\r\n";
$headers .= "".$message."\n";
$headers .= "--".$num."\n";
// Attachment headers
$headers .= "Content-Type:".$upload_type." ";
$headers .= "name=\"".$upload_name."\"r\n";
$headers .= "Content-Transfer-Encoding: base64\r\n";
$headers .= "Content-Disposition: attachment; ";
$headers .= "filename=\"".$upload_name."\"\r\n\n";
$headers .= "".$file."\r\n";
$headers .= "--".$num."--";
// SEND MAIL
$flgchk=#mail($to, $subject, $message, $headers);
fclose($fp);
In Mail Inbox It Returns:
Thanks In Advance...

Answer 1

Remove the last boundary, finish the mail with the last attachment string only, this removes the noname.txt in gmail.

Answer 2

Your code is perfect
change the code here.
In Attachment headers
Replace
$headers .= "Content-Type:".$upload_type." ";
with
$headers .= "Content-Type: multipart/mixed; ";

Answer 3

$header = "From: Info Mail<example#example.com>\r\n";
$header .= "MIME-Version: 1.0\r\n";
$header .= "Content-Type: multipart/mixed; boundary=\"".$num."\"\r\n\r\n";
$header .= "This is a multi-part message in MIME format.\r\n";
$header .= "--".$num."\r\n";
$header .= "Content-type:text/html; charset=UTF-8\r\n";
$header .= $message."\r\n\r\n";
$header .= "--".$num."\r\n";
$header .= "Content-Type: application/octet-stream; name=\"".$upload_name."\"\r\n"; // use different content types here
$header .= "Content-Transfer-Encoding: base64\r\n";
$header .= "Content-Disposition: attachment; filename=\"".$fname."\"\r\n\r\n";
$header .= $file."\r\n\r\n";
$header .= "--".$num."--";
I used the above headers for mails which seemed to work.

Answer 4

$upload_name=$_FILES["your_file_input_name"]["name"];
$upload_type=$_FILES["your_file_input_name"]["type"];
$upload_size=$_FILES["your_file_input_name"]["size"];
$upload_temp=$_FILES["your_file_input_name"]["tmp_name"];
$subject = "Your Subject";
$to="example#example.com";
$message="Your Message";
$fp = fopen($upload_temp, "rb");
$file = fread($fp, $upload_size);
$file = chunk_split(base64_encode($file));
$num = md5(time());
//Normal headers
$headers = "From: Info Mail<example#example.com>\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed; ";
$headers .= "boundary=".$num."\r\n";
$headers .= "--$num\r\n";
// This two steps to help avoid spam
$headers .= "Message-ID: <".gettimeofday()." TheSystem#".$_SERVER['SERVER_NAME'].">\r\n";
$headers .= "X-Mailer: PHP v".phpversion()."\r\n";
// With message
$headers .= "Content-Type: text/html; charset=iso-8859-1\r\n";
$headers .= "Content-Transfer-Encoding: 8bit\r\n";
$headers .= "".$message."\n";
$headers .= "--".$num."\n";
// Attachment headers
$headers .= "Content-Type: application/".$upload_type." ";
$headers .= "name=\"".$upload_name."\"r\n";
$headers .= "Content-Transfer-Encoding: base64\r\n";
$headers .= "Content-Disposition: attachment; ";
$headers .= "filename=\"".$upload_name."\"\r\n\n";
$headers .= "".$file."\r\n";
$headers .= "--".$num."--";
// SEND MAIL
$flgchk=#mail($to, $subject, $message, $headers);
fclose($fp);
if($flgchk)
{
echo 'Sent Successfully';
}
else
{
echo 'Unexpected error occurred!!! Please try again.';
}