附件名称和文件扩展名在电子邮件*.eml中不起作用

Question

我想创建.eml格式的电子邮件文件，其中包含多个附件。附件已生成，附件内容正确。但附件总是采用.dat格式，文件名为"ATT00001"、"ATT0002"。。etc

目前，我正在遵循这个stackoverflow问题中给出的解决方案，我的代码如下

PHP

   foreach($reports as $pdf){
        $attachment = file_get_contents("auto_report_attachments\Template_Attachment.eml");
        $attachment = str_replace("TEMPLATE_MIME_TYPE", $pdf['type'], $attachment);
        $attachment = str_replace("TEMPLATE_FILE_NAME", $pdf['filename'], $attachment);
        $attachment = str_replace("TEMPLATE_ATTACHMENT_CONTENT", base64_encode($pdf['file']), $attachment);
        $content .= $attachment;
        unset($attachment);
    }

模板附件

--080107000800000609090108
Content-Type: "TEMPLATE_MIME_TYPE"
name="TEMPLATE_FILE_NAME"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename="TEMPLATE_FILE_NAME"
TEMPLATE_ATTACHMENT_CONTENT

$content是上面链接中描述的主要电子邮件标题和正文。我的.eml文件看起来像；

MIME-Version: 1.0
Date: Tue, 16 Apr 2013 09:03:37 +0100
From: [e-mail]
To: [e-mail]
Subject: Email subject
Content-Type: multipart/mixed; boundary="080107000800000609090108"
This is a message with multiple parts in MIME format.
--080107000800000609090108
Content-Type: text/html
<p><strong>Project Name: Some Project and the body continues...</p>

--080107000800000609090108
Content-Type: "application/pdf"
name="AM22831 -  - Cover Sheet.pdf"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename="AM22831 -  - Cover Sheet.pdf"
JVBERi0xLjMKMyAwIG9iago8PC9UeXBlIC9QYWdlCi9QYXJlbnQgMSAwIFIKL1Jlc291cmNlcyAyIDAgUgovQ29udGVudHMgNCAwICiUlRU9GCg==

--080107000800000609090108
Content-Type: "application/pdf"
name="AM22831 -  - Manufacturing Status.pdf"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename="AM22831 -  - Manufacturing Status.pdf"
cSAxMTMuMzkgMCAwIDMwLjUzIDE0LjE3IDU1MC41OCBjbSAvSTEgRG8gUQpxIDAuMDAwIDAuMDAwIDEuMDAwIHJnIEJUIDEzMC4zOSRU9GCg==
--080107000800000609090108

当通过选择用PDF Reader打开文件时，上述base64内容在PDF文件中给出了正确的内容。但是这些文件不是.pdf格式的。.xls、.doc和所有其他文件类型也是如此。所有文件都采用.dat格式，具有标准命名，而不是指定的名称。

请帮助我解决此附件附带的指定文件名的必需file type。

注意：示例.eml文件中的base64内容被截断

Answer 1

我自己找到了答案。。！！Template_Attachment的标题应如下所示

--080107000800000609090108
Content-Type: TEMPLATE_MIME_TYPE;name="TEMPLATE_FILE_NAME"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;filename="TEMPLATE_FILE_NAME"
TEMPLATE_ATTACHMENT_CONTENT

在这种情况下，080107000800000609090108是边界，并且在所有附件的末尾，应该有另一个080107000800000609090108来结束电子邮件。

希望有一天这会对某人有所帮助：-(

PS：所以实际的.eml文件看起来如下，它可以完美地完成

MIME-Version: 1.0
Date: Tue, 16 Apr 2013 09:03:37 +0100
From: [e-mail]
To: [e-mail]
Subject: Email subject
Content-Type: multipart/mixed; boundary="080107000800000609090108"
This is a message with multiple parts in MIME format.
--080107000800000609090108
Content-Type: text/html
<p><strong>Project Name: Some Project and the body continues...</p>
--080107000800000609090108
Content-Type: application/pdf;name="AM22831 Cover Sheet.pdf"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;filename="AM22831 Cover Sheet.pdf"
JVBERi0xLjMKMyAwIG9iago8PC9UeXBlIC9QYWdlCi9QYXJlbnQgMSAwIFIKL1Jlc291cmNlcyAyIDAgUgovQ29udGVasdsDFDffjMBakdjKJHBzdHlsZT0iY29=
--080107000800000609090108
Content-Type: application/excel;name="AM22831 Manufacturing Status.xls"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;filename="AM22831 Manufacturing Status.xls"
DQoNCjx0YWJsZSBib3JkZXI9IjAiPg0KPHRyPg0KPHRkIGNvbHNwYW49IjMiIHJvd3NwYW49IjIiIGFsaWduPSJjZW50ZXIiPg0KICAgIDxoMSBzdHlsZT0iY29=