jQuery - 接收数据时出错

Here is my jQuery code:

 $.ajax({
    url: "/beautician/accept_order",
    data: dataOrder,
    dataType: "text",
    method: "POST",
    success : function(msg){
        console.log(msg);
    }
});

here is the PHP code:

public function accept_order(){
    echo "this is a test";
}

The output which I get in the console is: "success".

Please help me with this problem.