我在用 php 邮件发送附件时遇到问题。问题是电子邮件似乎已发送并已收到，但未被识别为附件。如果我进入邮件的来源，我可以看到它正在发送 base64 并包含附件名称，所以我很困惑为什么客户端无法识别它。有什么想法吗？
$uid = md5(uniqid(time()));
$headers = "From: ".$from_name." <".$mailto.">\n";
$headers .= "Reply-To: ".$from_mail."\n";
$headers .= "MIME-Version: 1.0\n";
$headers .= "Content-Type: multipart/mixed; boundary=\"".$uid."\"\n";
$headers .= "This is a multi-part message in MIME format.\n";
$headers .= "--".$uid."\n";
$headers .= "Content-type:text/plain\n";
$headers .= "Content-Transfer-Encoding: 8bit\n";
$headers .= $message."\n";
foreach ($_FILES as $file) {
$name = $file['name'];
$handle = fopen($file['tmp_name'], "r");
$content = fread($handle, $file['size']);
fclose($handle);
$content = chunk_split(base64_encode($content));
$headers .= "--{$uid}\n";
$headers .= "Content-Type: {$file['type']}; name=\"{$name}\"\n";
$headers .= "Content-Transfer-Encoding: base64\n";
$headers .= "Content-Disposition: attachment; filename=\"{$name}\"\n";
$headers .= $content;
}
$headers .= "--{$uid}--";
$mailto = 'myemail@email.com';
return mail($mailto, $subject, $message, $headers, '-f' . $mailto);
最佳答案
问题
您的代码有很多问题:
- 电子邮件 header 必须以
CRLF结尾。你只有LF。 - B64 编码的文件和消息被添加到标题中。它们应作为邮件正文发送。
- 每部分的消息头和消息体之间必须有一个额外的
CRLF。 - 正文部分必须由以
CRLF开头的分隔符分隔。
电子邮件语法
这是根据 RFC 2046 的多部分消息体结构的摘录。请特别注意 CRLF。 (BNF 语法，有些简化。)
multipart-body := [preamble CRLF]
dash-boundary CRLF
body-part *encapsulation
close-delimiter
[CRLF epilogue]
dash-boundary := "--" boundary
body-part := MIME-part-headers [CRLF *OCTET]
encapsulation := delimiter
CRLF body-part
delimiter := CRLF dash-boundary
close-delimiter := delimiter "--"
The code
Your code could look something like this:
$uid = md5(uniqid(time()));
$headers = "From: ".$from_name." <".$mailto.">\r\n";
$headers .= "Reply-To: ".$from_mail."\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed; boundary=\"".$uid."\"\r\n";
$body = "This is a multi-part message in MIME format.\n";
$body .= "--".$uid."\r\n";
$body .= "Content-type:text/plain\r\n";
$body .= "Content-Transfer-Encoding: 8bit\r\n";
$body .= "\r\n";
$body .= $message;
foreach ($_FILES as $file) {
$name = $file['name'];
$handle = fopen($file['tmp_name'], "r");
$content = fread($handle, $file['size']);
fclose($handle);
$content = chunk_split(base64_encode($content));
$body .= "\r\n--{$uid}\r\n";
$body .= "Content-Type: {$file['type']}; name=\"{$name}\"\r\n";
$body .= "Content-Transfer-Encoding: base64\r\n";
$body .= "Content-Disposition: attachment; filename=\"{$name}\"\r\n";
$body .= "\r\n";
$body .= $content;
}
$body .= "\r\n--{$uid}--";
$mailto = 'myemail@email.example';
return mail($mailto, $subject, $body, $headers, '-f' . $mailto);
引用资料
关于php - 尽管在 header 中发送了 base64，但仍无法识别附件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23340291/