使用PHP在电子邮件中发送多个附件
我有问题发送带有多个附件的电子邮件。 代码如下：
<?php
if(isset($_POST['sendEmail']))
{
foreach($_FILES['uploadEmail']['error'] as $key=>$value){
if(!$_FILES['uploadEmail']['error'][$key]){
$target_path = "";
$target_path = $target_path . basename( $_FILES['uploadEmail']['name'][$key]);
if(move_uploaded_file($_FILES['uploadEmail']['tmp_name'][$key], $target_path)){
$files[] = $_FILES['uploadEmail']['name'][$key];
}
}
}
$toEmails = explode(",",$_POST['toEmail']);
$count = count($toEmails);
$i = 0; $j = 1; $k = 100;
$bcc = '';
while($i<$count){
$bcc .= $toEmails[$i].",";
if($j==$k || $i==$count-1){
$j=1;
//echo $bcc.'<br />'.$sub.'<br />'.$message.'<br /><br />';
$from = 'test@gmail.com';
$sub = $_POST['subject'];
$message = $_POST['message'];
/////////////////////////
$headers = 'From:'. $from . "rn";
$headers .= "Bcc:". $bcc . "rn";
// boundary
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
// headers for attachment
$headers .= "nMIME-Version: 1.0n" . "Content-Type: multipart/mixed;n" . " boundary="{$mime_boundary}"";
// multipart boundary
$message = "This is a multi-part message in MIME format.nn" . "--{$mime_boundary}n" . "Content-Type: text/html; charset="iso-8859-1"n" . "Content-Transfer-Encoding: 7bitnn" . $message . "nn";
$message .= "--{$mime_boundary}n";
// preparing attachments
for($x=0;$x<count($files);$x++){
$file = fopen($files[$x],"rb");
//echo "<br>".filesize($files[$x]);
$data = fread($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: base64nn" . $data . "nn";
$message .= "--{$mime_boundary}n";
}
// send
/////////////////////////
mail('',$sub,$message,$headers);
$bcc = '';
}else{
$j++;
}
$i++;
}
}
?>
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<script src="http://js.nicedit.com/nicEdit-latest.js" type="text/javascript"></script>
<script type="text/javascript">bkLib.onDomLoaded(function() {
new nicEditor().panelInstance('message');
// new nicEditor({fullPanel : true}).panelInstance('area2');
});</script>
</head>
<body>
<form method="POST" enctype="multipart/form-data">
<table>
<tr><td><label for="toEmail">Send To : </label></td><td><textarea id="toEmail" name="toEmail" cols="100" rows="10"></textarea></td></tr>
<tr><td><label for="subject">Subject : </label></td><td><input type="text" name="subject" id="subject" size="98"></td></tr>
<tr><td><label for="toEmail">Message : </label></td><td><textarea id="message" name="message" cols="100" rows="10"></textarea></td></tr>
<tr><td><label for="upload[]">Attachments:</label></td><td></td></tr>
<tr><td><label>1</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td><label>2</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td><label>3</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td><label>4</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td><label>5</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td><label>6</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td><label>7</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td><label>8</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td><label>9</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td><label>10</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
<tr><td colspan="2" align="center"><input type="submit" value="Send Email" name="sendEmail" id="sendEmail"></td></tr>
</table>
</form>
<body>
</html>
我收到了邮件，但找不到任何附件。 有谁知道什么可能是错的？
这是我收到的一封电子邮件正文：
MIME-Version: 1.0 Content-Type: multipart/mixed;
boundary="==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x"
This is a multi-part message in MIME format.
--==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
ds fsdfsdfsdfsdfsdfsdfsf sffdfsdfsdfs fsdfdf sdf s
--==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x Content-Type: {"application/octet-stream"}; name="/tmp/phpHFTvAw"
Content-Disposition: attachment; filename="Lighthouse.jpg"
Content-Transfer-Encoding: base64
--==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x Content-Type: {"application/octet-stream"}; name="/tmp/phpyX67HR"
Content-Disposition: attachment; filename="Penguins.jpg"
Content-Transfer-Encoding: base64
--==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x
我建议使用PHPMailer发送带有附件的邮件：
<?php
require 'PHPMailerAutoload.php'; // If this file is not located in the same directory, use __DIR__ . "/path/to/PHPMailerAutoload.php"
$mail = new PHPMailer;
$mail->From = 'from@example.com';
$mail->FromName = 'Mailer';
$mail->addAddress('joe@example.net', 'Joe User'); // Add a recipient
$mail->addAddress('ellen@example.com'); // Name is optional
$mail->addReplyTo('info@example.com', 'Information');
$mail->addCC('cc@example.com');
$mail->addBCC('bcc@example.com');
$mail->addAttachment('/var/tmp/file.tar.gz'); // Add attachments
$mail->addAttachment('/tmp/image.jpg', 'new.jpg'); // Optional name
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = 'Here is the subject';
$mail->Body = 'This is the HTML message body <b>in bold!</b>';
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';
if(!$mail->send()) {
echo 'Message could not be sent.';
echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
echo 'Message has been sent';
}
?>
下载和文档：在这里。
回答
你的代码有几个问题，我在下面详细说明。
线尾
$headers = 'From:'. $from . "rn";
$headers .= "Bcc:". $bcc . "rn";
...
// headers for attachment
$headers .= "nMIME-Version: 1.0n"
. "Content-Type: multipart/mixed;n"
. " boundary="{$mime_boundary}"";
// multipart boundary
$message = "This is a multi-part message in MIME format.nn"
. "--{$mime_boundary}n"
. "Content-Type: text/html; charset="iso-8859-1"n"
. "Content-Transfer-Encoding: 7bitnn"
. $message
. "nn";
$message .= "--{$mime_boundary}n";
电子邮件中的行由CRLF （ rn ）序列分隔。 目前还不清楚mail()函数是否将n转换为rn ，但考虑到您的From:和Bcc:标头正在使用rn ，这些应该可能使用相同的。 您的输出还表示行尾可能缺失或格式错误。
从PHP手册：
如果没有收到消息，请尝试仅使用LF（ n）。 某些Unix邮件传输代理（最着名的是qmail）会自动用CRLF代替LF（如果使用CRLF，会导致CR翻倍）。 这应该是最后的手段，因为它不符合»RFC 2822。标题语法
$message .= "Content-Type: {"application/octet-stream"};n"
. " name="$files[$x]"n" .
删除大括号和引号：
$message .= "Content-Type: application/octet-streamn"
. " name="$files[$x]"n" .
而且， name参数已被弃用，以支持Content-Disposition头中的filename参数。 如果你想保持它的一些向后兼容性，你应该删除它的路径。 （您的输出表明您正在使用tmp_name而不是name ）。
分隔符
$message .= "--{$mime_boundary}n";
// preparing attachments
for($x=0;$x<count($files);$x++){
...
$message .= /* body part */;
$message .= "--{$mime_boundary}n";
}
请注意，最后的分隔符必须有两个尾部破折号。 在循环的开始处插入分隔符，并在循环后添加一个紧密的分隔符：
// preparing attachments
for($x=0;$x<count($files);$x++){
$message .= "--{$mime_boundary}n";
...
$message .= /* body part */;
}
$message .= "--{$mime_boundary}--n";
请参阅下面的电子邮件语法部分。
线路长度
$k = 100;
...
while($i<$count){
$bcc .= $toEmails[$i].",";
if($j==$k || $i==$count-1){
...
$headers .= "Bcc:". $bcc . "rn";
请注意，电子邮件中存在线路长度限制。 RFC 5322：
... Each line of characters MUST be no more than 998 characters, and SHOULD be no more than 78 characters, excluding the CRLF.
你可能想要缩短你的Bcc或者引入FWS（折叠空白）：
$bcc .= $toEmails[$i].",rn "; /* FWS */
其他事宜
一些可能会或可能不会有用的其他问题或通知：
foreach($_FILES['uploadEmail']['error'] as $key=>$value){
if(!$_FILES['uploadEmail']['error'][$key]){
最后一行与以下内容相同：
if(!$value){
$target_path = "";
$target_path = $target_path . basename( $_FILES['uploadEmail']['name'][$key]);
我假设$target_path应该被初始化为一个上传目录。
$toEmails = explode(",",$_POST['toEmail']);
通常，您不应允许随机用户提供传出电子邮件地址，但我怀疑这是一个可信用户的内部应用程序。
电子邮件语法
根据RFC 2046，这是多部分消息体结构的摘录。（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 "--"