使用PHP在电子邮件中发送多个附件

时间：2015-01-03 17:52:38

标签： php email email-attachments

发送包含多个附件的电子邮件时遇到问题。这是代码：

<?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 . "\r\n";
                $headers .= "Bcc:". $bcc . "\r\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[$x],"rb");
                    //echo "<br>".filesize($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: base64\n\n" . $data . "\n\n";
                    $message .= "--{$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，但找不到附件。 有谁知道什么可能是错的？

这是我收到的邮件正文：

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

2 个答案:

答案 0 :(得分：3)

我建议使用PHPMailer发送带附件的邮件：

<?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';
}

?>

下载和记录：here。

答案 1 :(得分：3)

答案

我的代码存在一些问题，我将在下面详述。

  • 行结尾

    $headers = 'From:'. $from . "\r\n";
$headers .= "Bcc:". $bcc . "\r\n";

...

// 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";

    电子邮件中的行由CRLF（\r\n）个序列分隔。目前还不清楚mail()函数是否将\n转换为\r\n，但考虑到您的From:和Bcc:标题正在使用\r\n，这些应该使用相同的。您的输出还表明行结尾可能丢失或格式错误。

    来自PHP Manual：

    如果未收到消息，请尝试仅使用LF（\ n）。一些Unix邮件传输代理（最值得注意的是» qmail）自动用CRLF替换LF（如果使用CRLF，则会导致CR加倍）。这应该是最后的手段，因为它不符合» RFC 2822。

  • 标头语法

    $message .= "Content-Type: {\"application/octet-stream\"};\n"
         .  " name=\"$files[$x]\"\n" .

    删除大括号和引号：

    $message .= "Content-Type: application/octet-stream\n"
         .  " name=\"$files[$x]\"\n" .

    此外，不推荐name参数支持filename标头中的Content-Disposition参数。如果要保持它的向后兼容性，则应从中删除路径。 （您的输出表明您使用的是tmp_name而不是name。）

  • 符

    $message .= "--{$mime_boundary}\n";

// preparing attachments
for($x=0;$x<count($files);$x++){
  ...
  $message .= /* body part */;
  $message .= "--{$mime_boundary}\n";
}

    请注意，最终分隔符必须有两个尾部破折号。在循环的开头插入分隔分隔符，并在循环后添加一个紧密分隔符：

    // 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。

  • 行长

    $k = 100;
...
while($i<$count){
  $bcc .= $toEmails[$i].",";
  if($j==$k || $i==$count-1){
    ...
    $headers .= "Bcc:". $bcc . "\r\n";

    请注意，电子邮件中存在行长度限制。 RFC 5322：

       ...                    Each line of characters MUST be no more than
   998 characters, and SHOULD be no more than 78 characters, excluding
   the CRLF.

    您可能希望缩短Bcc或缩短FWS (Folding White Space)：

    $bcc .= $toEmails[$i].",\r\n ";  /* FWS */

  • 其他问题

    可能会或可能没有用的其他一些问题或通知：

    foreach($_FILES['uploadEmail']['error'] as $key=>$value){
    if(!$_FILES['uploadEmail']['error'][$key]){

    最后一行与：

    相同 
        if(!$value){

    $target_path = "";
$target_path = $target_path . basename( $_FILES['uploadEmail']['name'][$key]);

    我假设$target_path应该初始化为上传目录。

    $toEmails = explode(",",$_POST['toEmail']);

    通常，您不应允许随机用户提供外发电子邮件地址，但我怀疑这是受信任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语法略有简化。）

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 "--"

参考

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