如何在我的flutter应用程序中用php设置从mysql获得的数据的样式？

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
?>

<?php
$sql = "SELECT id, name, email FROM users";
$result = $conn->query($sql);

$data = array();
if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        $data[] = $row;
    }
} else {
    echo "0 results";
}
$conn->close();

header('Content-Type: application/json');
echo json_encode($data);
?>

dependencies:
  flutter:
    sdk: flutter
  http: ^0.13.3

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

class User {
  final int id;
  final String name;
  final String email;

  User({required this.id, required this.name, required this.email});

  factory User.fromJson(Map<String, dynamic> json) {
    return User(
      id: json['id'],
      name: json['name'],
      email: json['email'],
    );
  }
}

class UserListScreen extends StatefulWidget {
  @override
  _UserListScreenState createState() => _UserListScreenState();
}

class _UserListScreenState extends State<UserListScreen> {
  List<User> users = [];

  @override
  void initState() {
    super.initState();
    fetchUsers();
  }

  Future<void> fetchUsers() async {
    final response = await http.get(Uri.parse('http://yourserver.com/get_users.php'));
    if (response.statusCode == 200) {
      List<dynamic> jsonResponse = json.decode(response.body);
      setState(() {
        users = jsonResponse.map((user) => User.fromJson(user)).toList();
      });
    } else {
      throw Exception('Failed to load users');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Users'),
      ),
      body: ListView.builder(
        itemCount: users.length,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text(users[index].name),
            subtitle: Text(users[index].email),
          );
        },
      ),
    );
  }
}

header("Access-Control-Allow-Origin: *");