php从数据库生成数组，输出中文json，不使用urlencode

header("Content-type: text/html; charset=utf-8");

$conn=mysql_connect("localhost","root","") or die("connot connect");
mysql_query("set names utf8");
mysql_select_db("database");

$sql="select * from table";

$re=mysql_query($sql,$conn);

$arr=array();

while($row=mysql_fetch_array($re,MYSQL_ASSOC))
{
array_push($arr,$row);
}

echo json_encode($arr,JSON_UNESCAPED_UNICODE);