我是php的大三学生。现在我尝试通过 php mail（） 发送一些附件，但是当我要阅读邮件时，它仅以文本形式显示（见下文）。附件内容也是空白的。我使用在互联网上找到的邮件表格。我认为错误出在/r/n 或/n 之类的事情上。对不起床英语。如果被问到，我可以解释更多，等待你的帮助！很抱歉代码发布太多，但我认为有必要理解......
表格
<form action="mailme.php" method="post" enctype="multipart/form-data">
-+-+- other inputs and select -+-+-
<input name="upload[]" type="file">
<input name="upload[]" type="file">
...other file attachments like that above
</form>
.PHP
Retrive variables and then
$headers ="From: ".$SenderName." <".$from.">'n";
// boundary
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
// headers for attachment
$headers .= "'nMIME-Version: 1.0'n" . "Content-Type: multipart/mixed;'n" . "
boundary='"{$mime_boundary}'"";
// multipart boundary
$message = "This is a multi-part message in MIME format.'n'n" . "--{$mime_boundary}'n"
. "Content-Type: text/html; charset='"iso-8859-1'"'n" .
"Content-Transfer-Encoding: 7bit'n'n" . $message . "'n'n";
$message .= "--{$mime_boundary}'n";
// preparing attachments
for($x=0;$x<count($files);$x++){
$file = fopen($files[$x],"rb");
$data = fread($file,filesize($files[$x]));
fclose($file);
$data = chunk_split(base64_encode($data));
$message .= "Content-Type: {'"application/octet-stream'"};'n" .
" name='"$files[$x]'"'n" .
"Content-Disposition: attachment;'n" . " filename='"$files[$x]'"'n" .
"Content-Transfer-Encoding: base64'n'n" . $data . "'n'n";
$message .= "--{$mime_boundary}'n";
}
// send
$success = @mail($to, $subject, $message, $headers);
if ($success) {
echo "<p>mail sent to $to!</p>";
} else {
print_r($files);
echo "<p>mail could not be sent!</p>".$from.'<br>'.$message.'<br>'.$to.'<br>'.$subject.'<br>'.$SenderName;
}
输出
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="==Multipart_Boundary_x553132b5cf2c4c84ecdbd3285b8b590dx"
This is a multi-part message in MIME format.
--==Multipart_Boundary_x553132b5cf2c4c84ecdbd3285b8b590dx
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message <b>with<b> some <a href="html">html</a>!
--==Multipart_Boundary_x9351bff6284cb1fc967281cfede5762cx
Content-Type: {"application/octet-stream"};
name=""
Content-Disposition: attachment;
filename=""
Content-Transfer-Encoding: base64
.....BLANK CONTENT! LIKE NO IMAGE WAS ATTACHED......
--==Multipart_Boundary_x553132b5cf2c4c84ecdbd3285b8b590dx
使用var_dump($files);来显示它包含的内容。它应该包含每个上传文件的数组，包括名称、类型、大小、tmp_name和错误（如果发生错误）
所以你的循环应该看起来像这样：
for($x=0;$x<count($files);$x++){
$file = fopen($files[$x]['tmp_name'],"rb");
// ^ path to the uploaded file
$data = fread($file,filesize($files[$x]['tmp_name']));
fclose($file);
$data = chunk_split(base64_encode($data));
$message .= "Content-Type: {'"application/octet-stream'"};'n" .
" name='"$files[$x]['name']'"'n" .
// ^ filename
"Content-Disposition: attachment;'n" . " filename='"$files[$x]['name']'"'n" .
"Content-Transfer-Encoding: base64'n'n" . $data . "'n'n";
$message .= "--{$mime_boundary}'n";
}
您也可以将$files[$x]['type']用于内容类型，但我不相信上传浏览器提供的内容。