如何把php导出的Excel 作为邮件发送

header("Content-type:application/octet-stream");    header("Accept-Ranges:bytes");    header("Content-type:application/vnd.ms-excel");      header("Content-Disposition:attachment;filename=".$filename.".xls");    header("Pragma: no-cache");    header("Expires: 0");    if (!empty($title)){        foreach ($title as $k => $v) {            $title[$k]=iconv("UTF-8", "GB2312",$v);        }        $title= implode("\t", $title);        echo "$title\n";    }    if (!empty($data)){        foreach($data as $key=>$val){            foreach ($val as $ck => $cv) {                $data[$key][$ck]=iconv("UTF-8", "GB2312", $cv);            }            $data[$key]=implode("\t", $data[$key]);        }        echo implode("\n",$data);    }

$mail    = new PHPMailer();       $mail->CharSet    = 'UTF-8';               $mail->IsSMTP();                   $mail->SMTPAuth   = true;                     $mail->SMTPSecure = '';                       $mail->Host       = $config['SMTP_HOST'];  // SMTP 服务器      $mail->Port       = $config['SMTP_PORT'];  // SMTP服务器的端口号      $mail->Username   = $config['SMTP_USER'];  // SMTP服务器用户名      $mail->Password   = $config['SMTP_PASS'];  // SMTP服务器密码      $mail->SetFrom($config['FROM_EMAIL'], $config['FROM_NAME']);      $replyEmail       = $config['REPLY_EMAIL']?$config['REPLY_EMAIL']:$config['FROM_EMAIL'];      $replyName        = $config['REPLY_NAME']?$config['REPLY_NAME']:$config['FROM_NAME'];      $mail->AddReplyTo($replyEmail, $replyName);      $mail->Subject    = $subject;      $mail->MsgHTML($body);      $mail->AddAddress($to, $name);      if(is_file($attachment)){                   // 添加附件          $mail->AddAttachment($attachment);      }      return $mail->Send()