二维码解析后文字乱码

$s = '%C2%B0%C3%99%C2%B6%C3%88%C2%B0%C3%99%C2%BF%C3%86%C2%A3%C2%AD%C2%B6%C3%BE%C3%8E%C2%AC%C3%82%C3%AB%C2%B4%C3%8A%C3%8C%C3%B5';$s = urldecode($s);echo utf8_decode($s);

$s = '%C2%B0%C3%99%C2%B6%C3%88%C2%B0%C3%99%C2%BF%C3%86%C2%A3%C2%AD%C2%B6%C3%BE%C3%8E%C2%AC%C3%82%C3%AB%C2%B4%C3%8A%C3%8C%C3%B5';$s = urldecode($s);if(mb_check_encoding('utf-8')) {  $n = 0;  for($i=0; $i<strlen($s); $i+=2) if((ord($s{$i}) & 0xf0) == 192) $n++;  if($n > strlen($s)/2 * 0.8) $s = utf8_decode($s);}echo $s;