php 创建桌面快捷方式 中文乱码问题 不同浏览器

$Nick=getNick($_GET['memberId']);
$filename=$Nick.'【'.$name.'】';
//$filename=iconv("UTF-8","gb2312",$filename);
  $shortCut = "[InternetShortcut]\r\nIDList=[{000214A0-0000-0000-C000-000000000046}]\r\nProp3=19,2\r\n";
  $shortCut .= "URL=".$url."\r\n";
  $icon='http://alizhibei.auagi.com/bitbug_favicon6464.ico';
  if($icon){
    $shortCut .= "IconFile=".$icon."";
  }
  header("content-type:application/octet-stream");
  // 获取用户浏览器
  $user_agent = $_SERVER['HTTP_USER_AGENT'];
  //$encode_filename = rawurlencode($filename);
  $encode_filename = urlencode($filename);
  
  // 不同浏览器使用不同编码输出
 // echo $user_agent;
  //exit;
  //file_put_contents("log.txt", $user_agent.PHP_EOL, FILE_APPEND);
  if(preg_match("/MSIE/", $user_agent)){
    header('content-disposition:attachment; filename="'.$encode_filename.'.url"');
  }else if(preg_match("/Firefox/", $user_agent)){
    header("content-disposition:attachment; filename*=\"utf8''".$filename.'.url"');
  }
  else if(preg_match("/Edge/", $user_agent)){
    header('content-disposition:attachment; filename="'.$encode_filename.'.url"');
  }
  else{
	header('content-disposition:attachment; filename="'.$filename.'.url"');
  }
  echo $shortCut;exit;