PHP JSON乱码简洁的解决办法

---

$arr = array('ret'=>400,

             'msg'=>'服务器地址不允许',

             'data'=>'');

foreach ( $arr as $key => $value ) {

    $arr[$key] = urlencode ( $value );

}

header("content-type:application/json;charset=utf-8");

echo urldecode ( json_encode ( $arr ) );

exit;

这样一定是中文的：

{“ret”:”400”,”msg”:”服务器地址不允许”,”data”:”“}