代码运行正常。它正在发送邮件，但我将与此邮件一起发送的附件。有附件显示，它也正在下载，但这是空的。正在显示1kb的大小。我已将所有必要的代码和属性放在正文，标题中。尽管如此，显示附件为空。这是代码问题还是服务器？双方都没有错误。邮件已发送，只是附件为空。
/* Email Detials */
$filename = '121 tech.jpg';
$path = 'http://121techtraining.in';
$file = $path . "/" . $filename;
$mailto = $cpmail;
$subject2 = 'Reeytal - Registration for TTT Workshop';
$message2 = 'Dear Participant';
$content = file_get_contents($file);
$content = chunk_split(base64_encode($content));
// a random hash will be necessary to send mixed content
$separator = md5(time());
// carriage return type (RFC)
$eol = "\r\n";
// main header (multipart mandatory)
$headers = "From: Ree-Ytal Consultancy <helpdesk@121techtraining.in >" . $eol;
$headers .= "MIME-Version: 1.0" . $eol;
$headers .= "Content-Type: multipart/mixed; boundary=\"" . $separator . "\"" . $eol;
$headers .= "Content-Transfer-Encoding: 7bit" . $eol;
$headers .= "This is a MIME encoded message." . $eol;
// message
$body = "--" . $separator . $eol;
$body .= "Content-Type: text/plain; charset=\"iso-8859-1\"" . $eol;
$body .= "Content-Transfer-Encoding: 8bit" . $eol;
$body .= $message2 . $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;
$body .= $content . $eol;
$body .= "--" . $separator . "--";
mail($mailto, $subject2, $body, $headers);