Send HTML message + attachment

[wesg]

I'm building a WordPress plugin that requires an email to be sent with an attachment and HTML message. I've found a post online, but it doesn't seem to be working.

Here are the long headers output by Mail.app:

--f95263082ad152438ba3ee2dfe86cf28
Content-Type: application/pdf; name="summary.pdf"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="summary.pdf"


Content-Type: multipart/alternative
--f95263082ad152438ba3ee2dfe86cf28
Content-Type: text/html; charset=iso-8859-1
Content-Transfer-Encoding: 8bit

[coopster]

Here is an example that has been stripped from a class where I add attachments to an array with the key being the file name and the value is the actual file contents (pdf document, picture, etc.)

if ($this->_attachments) { 
  $boundary = '=_' . md5(rand() . microtime()); 
  $headers['MIME-Version'] = '1.0'; 
  $headers['Content-Type'] = "multipart/mixed;{$this->CRLF}\tboundary=\"{$boundary}\""; 
  $hdrs = "--{$boundary}{$this->CRLF}"; 
  $hdrs .= "Content-Transfer-Encoding: 7bit{$this->CRLF}"; 
  $hdrs .= "Content-Type: text/plain; charset=\"ISO-8859-1\"{$this->CRLF}"; 
  $this->message = $hdrs . $this->CRLF . $this->message; 
  foreach ($this->_attachments as $filename => $file) { 
   $hdrs = "--{$boundary}{$this->CRLF}"; 
   $hdrs .= "Content-Transfer-Encoding: base64{$this->CRLF}"; 
   $hdrs .= "Content-Type: application/octet-stream;{$this->CRLF}\tname=\"{$filename}\"{$this->CRLF}"; 
   $hdrs .= "Content-Disposition: attachment;{$this->CRLF}\tfilename=\"{$filename}\"{$this->CRLF}"; 
   $this->message .= $hdrs . $this->CRLF . rtrim(chunk_split(base64_encode($file), 76, $this->CRLF)) . $this->CRLF; 
  } 
  $this->message .= "--{$boundary}--{$this->CRLF}"; 
}