发送带有附件的PHP HTML邮件 [英] Send PHP HTML mail with attachments

问题描述

我有一个问题：直到今天，我使用包含

 内容类型的标题发送HTML邮件：为text / html; 
  

现在，我添加了添加附件的功能。为此，我不得不将此行更改为

  Content-Type：multipart / mixed; 
  

现在，使用 multipart / mixed 其余的邮件，所以正常的文字，显示为文本/平原。我如何才能意识到这个附件是有效的，而mailtext仍然是HTML？

解决方案

要发送带有附件的电子邮件，我们需要使用指定混合类型将包含在电子邮件中的multipart / mixed MIME类型。此外，我们想使用multipart / alternative MIME类型发送电子邮件的纯文本和HTML版本。看一下例子：

 <？php 
 //定义电子邮件的接收者
 $ to ='[e-mail]'; 
 //定义电子邮件的主题
 $ subject ='使用附件测试电子邮件; 
 //创建边界字符串。它必须是唯一的
 //所以我们使用MD5算法来生成随机哈希
 $ random_hash = md5（date（'r'，time（）））; 
 //定义要传递的标题。请注意，它们与\\\
 
 $ headers =From：[e-mail]\r\\\
Reply-To：[e-mail]分开; 
 //添加边界字符串和MIME类型规范
 $ headers。=\r\\\
Content-Type：multipart / mixed; boundary = \PHP混合 - $ random_hash。 \ ; 
 //将文件内容读入一个字符串，
 //用MIME base64，
 //编码，并将其拆分成较小的块
 $ attachment = chunk_split（base64_encode（的file_get_contents（ 'attachment.zip'）））; 
 //定义消息的正文。 
 ob_start（）; //打开输出缓冲
？> 
 --PHP-mixed-<？php echo $ random_hash; ？> 
内容类型：multipart / alternative; boundary =PHP-alt-<？php echo $ random_hash;？> 
 
 --PHP-alt-<？php echo $ random_hash; ？> 
 Content-Type：text / plain; charset =iso-8859-1
 Content-Transfer-Encoding：7bit 
 
 Hello World！ 
这是简单的文本电子邮件。 
 
 --PHP-alt-<？php echo $ random_hash; ？> 
内容类型：text / html; charset =iso-8859-1
 Content-Transfer-Encoding：7bit 
 
< h2> Hello World！< / h2> 
< p>这是< b> HTML< / b> 。格式化及LT; / p为H. 
 
 --PHP-alt-<？php echo $ random_hash; ？>  -  
 
 --PHP-mixed-<？php echo $ random_hash; ？> 
内容类型：application / zip; name =attachment.zip
内容传输编码：base64 
内容处理：附件
 
<？php echo $ attachment; ？> 
 --PHP-mixed-<？php echo $ random_hash; ？>  -  
 
<？php 
 //将当前缓冲区内容复制到$ message变量中，并删除当前输出缓冲区
 $ message = ob_get_clean（）; 
 //发送电子邮件
 $ mail_sent = @mail（$ to，$ subject，$ message，$ headers）; 
 //如果邮件发送成功打印邮件发送。否则打印邮件失败
 echo $ mail_sent？ 邮件发送：邮件失败; 
？> 
  

如您所见，发送带附件的电子邮件很容易完成。在前面的例子中，我们使用了multipart / mixed MIME类型，其中包含多个/替代的MIME类型，它指定了两个版本的电子邮件。要包括我们的消息的附件，我们从指定的文件中读取数据到一个字符串，用base64进行编码，将其拆分成更小的块，以确保它符合MIME规范，然后将其作为附件包含。 >

I got a problem: Until today, I sent HTML mails with PHP using a header which contains

Content-type: text/html;

Now, I added functionality to add attachments. For this, I had to change this line to

Content-Type: multipart/mixed;

Now, with multipart/mixed, the rest of the mail, so the normal text, gets shown just as text/plain. How can I realize that attachments work and the mailtext is still HTML?

解决方案

To send an email with attachment we need to use the multipart/mixed MIME type that specifies that mixed types will be included in the email. Moreover, we want to use multipart/alternative MIME type to send both plain-text and HTML version of the email.Have a look at the example:

<?php 
//define the receiver of the email 
$to = '[e-mail]'; 
//define the subject of the email 
$subject = 'Test email with attachment'; 
//create a boundary string. It must be unique 
//so we use the MD5 algorithm to generate a random hash 
$random_hash = md5(date('r', time())); 
//define the headers we want passed. Note that they are separated with \r\n 
$headers = "From: [e-mail]\r\nReply-To: [e-mail]"; 
//add boundary string and mime type specification 
$headers .= "\r\nContent-Type: multipart/mixed; boundary=\"PHP-mixed-".$random_hash."\""; 
//read the atachment file contents into a string,
//encode it with MIME base64,
//and split it into smaller chunks
$attachment = chunk_split(base64_encode(file_get_contents('attachment.zip'))); 
//define the body of the message. 
ob_start(); //Turn on output buffering 
?> 
--PHP-mixed-<?php echo $random_hash; ?>  
Content-Type: multipart/alternative; boundary="PHP-alt-<?php echo $random_hash; ?>" 

--PHP-alt-<?php echo $random_hash; ?>  
Content-Type: text/plain; charset="iso-8859-1" 
Content-Transfer-Encoding: 7bit

Hello World!!! 
This is simple text email message. 

--PHP-alt-<?php echo $random_hash; ?>  
Content-Type: text/html; charset="iso-8859-1" 
Content-Transfer-Encoding: 7bit

<h2>Hello World!</h2> 
<p>This is something with <b>HTML</b> formatting.</p> 

--PHP-alt-<?php echo $random_hash; ?>-- 

--PHP-mixed-<?php echo $random_hash; ?>  
Content-Type: application/zip; name="attachment.zip"  
Content-Transfer-Encoding: base64  
Content-Disposition: attachment  

<?php echo $attachment; ?> 
--PHP-mixed-<?php echo $random_hash; ?>-- 

<?php 
//copy current buffer contents into $message variable and delete current output buffer 
$message = ob_get_clean(); 
//send the email 
$mail_sent = @mail( $to, $subject, $message, $headers ); 
//if the message is sent successfully print "Mail sent". Otherwise print "Mail failed" 
echo $mail_sent ? "Mail sent" : "Mail failed"; 
?>

As you can see, sending an email with attachment is easy to accomplish. In the preceding example we have multipart/mixed MIME type, and inside it we have multipart/alternative MIME type that specifies two versions of the email. To include an attachment to our message, we read the data from the specified file into a string, encode it with base64, split it in smaller chunks to make sure that it matches the MIME specifications and then include it as an attachment.

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