PHP mail attachment is not working - php

Question

i am using php mail function to sent attachment, but its not working. Here is my code:
$headers = array(
"Mime-Version: 1.0",
"Content-Type: text/html; charset=charset=UTF-8",
"From: Test <myemail>",
"Content-Disposition: attachment; filename=\"" . $_SERVER['DOCUMENT_ROOT']."/project_name/test.txt" . "\"\r\n"; // For Attachment
);
$headers = join("\r\n", $headers);
mail($to, $subject, $body, $headers);
Email sent successfully and file is attached, but the content is hidden.

Answer 1

I recommend you to use PHPMailer.
To use PHPMailer:
Download the PHPMailer script from here: http://github.com/PHPMailer/PHPMailer
Extract the archive and copy the script's folder to a convenient place in your project.
Include the main script file -- require_once('path/to/file/class.phpmailer.php');
Now use as :
$email = new PHPMailer();
$email->From = 'you#example.com';
$email->FromName = 'Your Name';
$email->Subject = 'Message Subject';
$email->Body = $bodytext;
$email->AddAddress( 'destinationaddress#example.com' );
$file_to_attach = 'PATH_OF_YOUR_FILE_HERE';
$email->AddAttachment( $file_to_attach , 'nameOfFile.pdf' );
return $email->Send();

Answer 2

Your content type should be
"Content-Type: multipart/mixed; charset=charset=UTF-8",
see this answer, this can guide you solve your problem.
I also have a big doubt, if it is correct
"Content-Disposition: attachment; filename=\"" . $_SERVER['DOCUMENT_ROOT']."/project_name/test.txt" . "\"\r\n"; // For Attachment
combination of single and double quote does not seems to good. Can you please change it to
"Content-Disposition: attachment; filename=\" . $_SERVER['DOCUMENT_ROOT'] . "/project_name/test.txt" . "\"\r\n";
or try using single quote as you are not parsing any variable.

Answer 3

If you want to write your own code and don't want to implement the mail libraries. Please do it like this
$handle = fopen($file_name, "r");
$content = fread($handle, filesize($file_name));
fclose($handle);
$encoded_content = chunk_split(base64_encode($content));
$boundary = md5("foobar");
$message = "I have some message";
//header
$headers = "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed; boundary = $boundary\r\n\r\n";
//plain text
$body = "--$boundary\r\n";
$body .= "Content-Type: text/plain; charset=ISO-8859-1\r\n";
$body .= "Content-Transfer-Encoding: base64\r\n\r\n";
$body .= chunk_split(base64_encode($message));
//attachment
$body .= "--$boundary\r\n";
$body .="Content-Type: $file_type; name=".$file_name."\r\n";
$body .="Content-Disposition: attachment; filename=".$file_name."\r\n";
$body .="Content-Transfer-Encoding: base64\r\n";
$body .="X-Attachment-Id: ".rand(1000,99999)."\r\n\r\n";
$body .= $encoded_content;
mail($to, $subject, $body, $headers);

Answer 4

$to = "YOUR EMAIL ID";
$from = "Website <website#mydomain.com>";
$subject = "Test Attachment Email";
$separator = md5(time());
// carriage return type (we use a PHP end of line constant)
$eol = PHP_EOL;
// attachment name
$filename = "document.pdf";
//$pdfdoc is PDF generated by FPDF
$attachment = chunk_split(base64_encode($pdfdoc));
// main header
$headers = "From: ".$from.$eol;
$headers .= "MIME-Version: 1.0".$eol;
$headers .= "Content-Type: multipart/mixed; boundary=\"".$separator."\"";
// no more headers after this, we start the body! //
$body = "--".$separator.$eol;
$body .= "Content-Transfer-Encoding: 7bit".$eol.$eol;
$body .= "This is a MIME encoded message.".$eol;
// message
$body .= "--".$separator.$eol;
$body .= "Content-Type: text/html; charset=\"iso-8859-1\"".$eol;
$body .= "Content-Transfer-Encoding: 8bit".$eol.$eol;
$body .= $message.$eol;
// attachment
$body .= "--".$separator.$eol;
$body .= "Content-Type: application/octet-stream; name=\"".$filename."\"".$eol;
$body .= "Content-Transfer-Encoding: base64".$eol;
$body .= "Content-Disposition: attachment".$eol.$eol;
$body .= $attachment.$eol;
$body .= "--".$separator."--";
// send message
if (mail($to, $subject, $body, $headers)) {
echo "mail send ... OK";
} else {
echo "mail send ... ERROR";
}