Codeigniter 发送邮件：附件已损坏

Question

我使用 PHPPowerpoint 创建一个 .pptx 文件并将其保存到服务器。用户现在在网站中有 2 个选项：

直接下载文件：这很好用。文件打开没有任何错误。
自己发送带有附件的邮件：邮件发送正确，但是当我尝试打开它时，附件 .pptx 说它已损坏。

这是我的 php 发送邮件的代码：

$config['smtp_host'] = 'xxx';
$config['protocol'] = 'smtp';
$this->email->initialize($config);

$this->email->from('xxx', 'xxx');
$this->email->to('xxx');

$this->email->subject($_POST['id']." ".$_POST['title']);
$this->email->message('See attachment.');
$this->email->attach($filepath);
$this->email->send();

我已经用 7zip 打开了这两个文件，并提到，对于通过邮件发送的文件，文件 Content_types.xml 无法打开。

可能出了什么问题以及如何解决？

这是发送 pptx vai 邮件时丢失的正确 Header：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">
  <Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/>
  <Default Extension="xml" ContentType="application/xml"/>
  <Override PartName="/ppt/theme/theme1.xml" ContentType="application/vnd.openxmlformats-officedocument.theme+xml"/>
  <Override PartName="/ppt/presentation.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.presentation.main+xml"/>
  <Override PartName="/docProps/app.xml" ContentType="application/vnd.openxmlformats-officedocument.extended-properties+xml"/>
  <Override PartName="/docProps/core.xml" ContentType="application/vnd.openxmlformats-package.core-properties+xml"/>
  <Override PartName="/ppt/slideMasters/slideMaster1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideMaster+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout2.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout3.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout4.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout5.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout6.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout7.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout8.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout9.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout10.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slideLayouts/slideLayout11.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"/>
  <Override PartName="/ppt/slides/slide1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slide+xml"/>
  <Default Extension="gif" ContentType="image/gif"/>
  <Default Extension="jpg" ContentType="image/jpeg"/>
  <Default Extension="jpeg" ContentType="image/jpeg"/>
  <Default Extension="png" ContentType="image/png"/>
  <Default Extension="xlsx" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"/>
</Types>

Answer 1

找到这个作为工作解决方案：https://github.com/bcit-ci/CodeIgniter/issues/4746

"There is an issue which occurs in /system/libraries/Email.php on line 1471 when you add attachments to an email and none of them have a Content-ID ."

 .(empty($this->_attachments[$i]['cid']) ? '' : 'Content-ID: <'.$this->_attachments[$i]['cid'].'>'.$this->newline).$this->newline

它应该用 CI 3.1.0 修复，但它对我根本不起作用。修改第 1471 行有帮助。

Codeigniter 发送邮件：附件已损坏

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