php jsonparsing错误浏览器没有数据

Question

<?php

$con = mysqli_connect("localhost", "alsmwsk3", "skrktkzl12", "alsmwsk3");
$result = mysqli_query($con, "select * from NOTICE ORDER BY noticeDate DESC");
$response = array();

$num = 0;


while($row = mysqli_fetch_array($result))
{
    array_push($response, array("noticeContent"=>$row[0],"noticeName"=>$row[1],"noticeDate"=>$row[2]));
    echo $num;                                 
}

//php를 읽었을떄 json타입이 아닐 readed php not but json?
//print (json_encode($response));
//    echo json_encode(array("response"));

echo json_encode(array("response"=>$response));
mysqli_close($con);

?>

当我在浏览器上打开这个phpsource时，浏览器上没有数据我觉得我错了某种错过吗？

它是mysql设置