邮件附件

我似乎无法找到我写这个PHP函数的问题，应该发送附件的电子邮件。 我一直在努力挣扎。

function myMail($to, $subject, $mail_msg, $filename, $contentType){

    $random_hash = md5(date('r', time()));
    $headers = "From: webmaster@example.comrnReply-To: ".$to;
    $headers .= "rnContent-Type: ".$contentType.
        "; boundary="PHP-mixed-".$random_hash.""";

    $attachment = chunk_split(base64_encode(file_get_contents($filename)));
    ob_start();

    echo "
--PHP-mixed-$random_hash
Content-Type: multipart/alternative; boundary="PHP-alt-$random_hash"

--PHP-alt-$random_hash
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit

$mail_msg

--PHP-alt-$random_hash

--PHP-mixed-$random_hash--
Content-Type: text/plain; name="$filename" 
Content-Transfer-Encoding: base64 
Content-Disposition: attachment 

$attachment
--PHP-mixed-$random_hash--
";
    $message = ob_get_clean();
    $mail_sent = @mail( $to, $subject, $message, $headers );
    return $mail_sent ? "Mail sent" : "Mail failed";
}

编辑问题是邮件的邮件与文件混合并作为附件发送。

---

我刚刚看了几封电子邮件，我注意到最终附件边界以' - '结尾，而开始边界标记没有。 在你的代码中，你有：

--PHP-mixed-$random_hash--
Content-Type: text/plain; name="$filename" 
Content-Transfer-Encoding: base64 
Content-Disposition: attachment 

$attachment
--PHP-mixed-$random_hash--

也许它应该是：

--PHP-mixed-$random_hash
Content-Type: text/plain; name="$filename" 
Content-Transfer-Encoding: base64 
Content-Disposition: attachment 

$attachment
--PHP-mixed-$random_hash--

看看这里的例子：

http://en.wikipedia.org/wiki/MIME#Multipart_messages

---

Artefacto让我更加关注输出，并且找到了解决方法：

function myMail($to, $subject, $mail_msg, $filename, $contentType, $pathToFilename){
    $random_hash = md5(date('r', time()));
    $headers = "From: webmaster@mysite.comrnReply-To: ".$to;
    $headers .= "rnContent-Type: multipart/mixed; boundary="PHP-mixed-".$random_hash.""";
    $attachment = chunk_split(base64_encode(file_get_contents($pathToFilename)));
    ob_start();
 echo "
--PHP-mixed-$random_hash
Content-Type: multipart/alternative; boundary="PHP-alt-$random_hash"

--PHP-alt-$random_hash
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit

$mail_msg

--PHP-alt-$random_hash--

--PHP-mixed-$random_hash
Content-Type: $contentType; name="$filename" 
Content-Transfer-Encoding: base64 
Content-Disposition: attachment 

$attachment
--PHP-mixed-$random_hash--
";
$message = ob_get_clean();
$fh=fopen('log.txt','w');
fwrite($fh,$message);
$mail_sent = @mail( $to, $subject, $message, $headers );
return $mail_sent ? "Mail sent" : "Mail failed";
}

---

除非你这样做才能了解MIME邮件的内部运作，否则标准答案是使用像PHPMailer或Swiftmailer这样的邮件程序库，它可以处理开箱即用的附件。

SwiftMailer关于如何附加文件的例子在这里。

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