[B00MER]

 // attachments
 if($AttmFiles){
  foreach($AttmFiles as $AttmFile){
   $patharray = explode ("/", $AttmFile); 
   $FileName=$patharray[count($patharray)-1];
   $Msg.= "\n--".$OB."\n";
   $Msg.="Content-Type: application/octetstream;\n\tname=\"".$FileName."\"\n";
   $Msg.="Content-Transfer-Encoding: base64\n";
   $Msg.="Content-Disposition: attachment;\n\tfilename=\"".$FileName."\"\n\n";
            
   //file goes here
   $fd=fopen ($AttmFile, "r");
   $FileContent=fread($fd,filesize($AttmFile));
   fclose ($fd);
   $FileContent=chunk_split(base64_encode($FileContent));
   $Msg.=$FileContent;
   $Msg.="\n\n";
  }
 }

The files are attached by an array specified.
$attmFile = Array("/home/sites/blah.com/attachment.jpg");

Found this on www.php.net/mail, sure it could be integrated into include/func.php for what's needed to attach files to the email's sent.