来自PHP的电子邮件已经破坏了Subject标题编码 [英] Email from PHP has broken Subject header encoding

问题描述

我的PHP脚本向用户发送电子邮件，当电子邮件到达邮箱时，主题行（ $ subject ）的字符包含 a ^ £添加到我的主题文本的末尾。这显然是编码问题。电子邮件内容本身很好，只是主题行被破坏。

我已经搜索过，但找不到如何正确编码我的主题。

这是我的标题。请注意，我使用内容类型与 charset = utf-8 和 Content-转移编码：8bit 。

  //设置所有必需的标题
 $ headers = From：$ sender_name< $ from> \\\
; 
 $ headers。=Reply-To：$ sender_name< $ from> \\\
; 
 $ headers。=X-Sender：$ sender_name< $ from> \\\
; 
 $ headers。=X-Mailer：PHP4\\\
; // mailer 
 $ headers。=X-Priority：3\\\
; // 1 UrgentMessage，3 Normal 
 $ headers。=MIME-Version：1.0\\\
; 
 $ headers。=X-MSMail-Priority：High\\\
; 
 $ headers。=重要性：3\\\
; 
 $ headers。=Date：$ date\\\
; 
 $ headers。=Delivered-to：$ to\\\
; 
 $ headers。=返回路径：$ sender_name< $ from> \\\
; 
 $ headers。=Envelope-from：$ sender_name< $ from> \\\
; 
 $ headers。=Content-Transfer-Encoding：8bit\\\
; 
 $ headers。=Content-Type：text / plain; charset = UTF-8\\\
; 
  

解决方案

更新实际和最新的答案，请查看 Palec的答案。

---

Content-Type 中指定的字符编码仅描述消息正文的字符编码，但不描述头文件。您需要使用编码字语法使用 可引用编码或 Base64 encoding ：

  encoded-word ==？字符集？编码？编码文本？=
  

您可以使用 imap_8bit for quoted-printable encoding and base64_encode

主题：=？UTF-8？B？base64_encode .imap_8bit（$ subject）？=

My PHP script sends email to users and when the email arrives to their mailboxes, the subject line ($subject) has characters like a^£ added to the end of my subject text. This is obviously and encoding problem. The email message content itself is fine, just the subject line is broken.

I have searched all over but can’t find how to encode my subject properly.

This is my header. Notice that I’m using Content-Type with charset=utf-8 and Content-Transfer-Encoding: 8bit.

//set all necessary headers
$headers = "From: $sender_name<$from>\n";
$headers .= "Reply-To: $sender_name<$from>\n";
$headers .= "X-Sender: $sender_name<$from>\n";
$headers .= "X-Mailer: PHP4\n"; //mailer
$headers .= "X-Priority: 3\n"; //1 UrgentMessage, 3 Normal
$headers .= "MIME-Version: 1.0\n";
$headers .= "X-MSMail-Priority: High\n";
$headers .= "Importance: 3\n";
$headers .= "Date: $date\n";
$headers .= "Delivered-to: $to\n";
$headers .= "Return-Path: $sender_name<$from>\n";
$headers .= "Envelope-from: $sender_name<$from>\n";
$headers .= "Content-Transfer-Encoding: 8bit\n";
$headers .= "Content-Type: text/plain; charset=UTF-8\n";

解决方案

Update   For a more practical and up-to-date answer, have a look at Palec’s answer.

---

The specified character encoding in Content-Type does only describe the character encoding of the message body but not the header. You need to use the encoded-word syntax with either the quoted-printable encoding or the Base64 encoding:

encoded-word = "=?" charset "?" encoding "?" encoded-text "?="

You can use imap_8bit for the quoted-printable encoding and base64_encode for the Base64 encoding:

"Subject: =?UTF-8?B?".base64_encode($subject)."?="
"Subject: =?UTF-8?Q?".imap_8bit($subject)."?="

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