php的附件邮件类

<? 
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=

这是一个php的附件邮件类，需要的朋友可以下载使用