php的附件郵件類別

<? 

class CMailFile {  

  var $subject;  

  var $addr_to;  

  var $text_body;  

  var $text_encoded;  

  var $mime_headers;  

  var $mime_boundary = "--==================_846811060==_";  

  var $smtp_headers;  

  function CMailFile($subject,$to,$from,$msg,$filename,$downfilename,$mimetype = "application/octet-stream",$mime_filename = false) {  

    $this->subject = $subject;     

    $this->addr_to = $to;     

    $this->smtp_headers = $this->write_smtpheaders($from); 

    $this->text_body = $this->write_body($msg); 

    $this->text_encoded = $this->attach_file($filename,$downfilename,$mimetype,$mime_filename); 

    $this->mime_headers = $this->write_mimeheaders($filename, $mime_filename); 

  }  

  function attach_file($filename,$downfilename,$mimetype,$mime_filename) { 

    $encoded = $this->encode_file($filename); 

    if ($mime_filename) $filename = $mime_filename; 

    $out = "--" . $this->mime_boundary . "\n"; 

    $out = $out . "Content-type: " . $mimetype . "; name=\"$filename\";\n"; 

    $out = $out . "Content-Transfer-Encoding: base64\n"; 

    $out = $out . "Content-disposition: attachment; filename=