微信创建菜单报 must use utf-8 charset hint 错误

<?php
    include '../WeiXinApi/WeiXinApi.php';
    //创建菜单.
    $access_token= getToken();
    if ($access_token =='-1')
    {
        echo ("get token failed");
        exit();
    }
    $getCreatMenuUrl='https://api.weixin.qq.com/cgi-bin/menu/create?access_token='.$access_token;
    $jsonStr= '{"button":[{"type":"click","name":"今日歌曲","key":"V1001_TODAY_MUSIC"},{"name":"菜单","sub_button":[{"type":"view","name":"搜索","url":"http://www.soso.com/"},{"type":"click","name":"赞一下我们","key":"V1001_GOOD"}]}]}';
    //$jsonStr=json_encode($jsonStr,JSON_UNESCAPED_UNICODE); 
    $responsJson=http_post_json($getCreatMenuUrl, $jsonStr);
    echo ($responsJson[0] . $responsJson[1]);
    
?>

这是因为本身windows平台文件是不是默认utf-8格式的, 另存为把文件改成utf-8格式.. 运行正确.