我的代码如下所示，如果我回显它，我可以很好地显示正文，但当我尝试编码它时，它返回空
$con=mysqli_connect("localhost", "root","","eservices");
$sql="select * from news order by id DESC";
$result=mysqli_query($con,$sql);
mysqli_set_charset($con,"utf8");
$news=array();
while($row=mysqli_fetch_array($result)){
array_push($news, array("headline"=>$row[2],"body"=>$row[3]));
}
echo json_encode(array("news_response"=>$news));
mysqli_close($con);
您应该将mysqli_set_charset($con,"utf8");移动到连接下，以便在运行查询后延迟执行
$con=mysqli_connect("localhost", "root","","eservices");
mysqli_set_charset($con,"utf8");