Sending multiple attachment in an email using PHP

2019-01-15 11:56发布

站内问答 / PHP
380 2 4

I have problem sending an email with multiple attachments. Here is the code:

<?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>

I received mail but could not find any attachments with it. Does anyone know what could be wrong?

Here is an email body which I got in mail:

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条回答
劫难
2楼-- · 2019-01-15 12:21

Answer

There are a few problems with your code that I have detailed below.

  • Line endings

    $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";

    Lines in email messages are separated by CRLF (\r\n) sequences. It is unclear whether the mail() function converts \n into \r\n or not, but considering that your From: and Bcc: headers are using \r\n, these should probably use the same. Your output also indicates that the line endings are possibly missing or malformed.

    From the PHP Manual:

    If messages are not received, try using a LF (\n) only. Some Unix mail transfer agents (most notably » qmail) replace LF by CRLF automatically (which leads to doubling CR if CRLF is used). This should be a last resort, as it does not comply with » RFC 2822.

  • Header syntax

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

    Remove the braces and the quotes:

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

    Also, the name parameter has been deprecated in favour of the filename parameter in the Content-Disposition header. If you want to keep it for some backward compatibility, you should remove the path from it. (Your output indicates that you're using tmp_name rather than name).

  • Delimiters

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

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

    Note that the final delimiter must have two trailing dashes. Insert the dividing delimiters at the beginning of the loop, and add a close delimiter after the loop:

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

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

    See the section on Email syntax below.

  • Line lengths

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

    Note that there are line length limits in email messages. RFC 5322:

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

    You may want to cut your Bcc's shorter or introduce FWS (Folding White Space):

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

  • Other issues

    Some further issues or notices that might or might not be useful:

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

    The last line is the same as:

        if(!$value){

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

    I'm assuming that $target_path should be initialized to an upload directory.

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

    Generally, you should not allow random users to provide outgoing email addresses, but I suspect that this is an internal application for trusted users.

Email syntax

This is an excerpt of what the structure of a multi-part message body looks like according to RFC 2046. (BNF syntax, somewhat simplified.)

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 "--"

References

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对你真心纯属浪费
3楼-- · 2019-01-15 12:25

I propose to use PHPMailer for sending mails with attachements:

<?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';
}

?>

Download and documentation: here.

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