我使用此功能在我的邮件中附加pdf。它工作得很好，但是当用户试图打开pdf文件时，他会收到一条消息，告诉他文件无法打开，因为文件格式有问题。
// a random hash will be necessary to send mixed content
$separator = md5(time());
// carriage return type (we use a PHP end of line constant)
$eol = "'r'n";
// attachment name
$filename = $invoice.'.pdf';
// encode data (puts attachment in proper format)
$attachment = chunk_split(base64_encode($filename));
//$attachment = $filename;
// main header
$from = "test@productionserver.in";
$headers = "From: ".$from.$eol;
$headers .= "MIME-Version: 1.0".$eol;
$headers .= "Content-Type: multipart/mixed; boundary='"".$separator."'"".$eol;
// no more headers after this, we start the body! //
$body = "--".$separator.$eol;
$body .= "Content-Transfer-Encoding: 7bit".$eol.$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."--";
mail($to,$subject,$body,$headers);
有谁知道我做错了什么吗?
$attachment = chunk_split(base64_encode($filename));
您正在编码文件名作为附件。您需要编码实际的文件，而不仅仅是它的名称。
$attachment = chunk_split(base64_encode(file_get_contents($filename)));