如何使用PHP和Vue实现数据分页功能

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 获取当前页码和每页数据量
$page = $_GET["page"];
$pageSize = $_GET["pageSize"];

// 计算起始索引
$startIndex = ($page - 1) * $pageSize;

// 查询数据
$sql = "SELECT * FROM products LIMIT $startIndex, $pageSize";
$result = $conn->query($sql);

// 将结果转换为数组
$data = [];
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        $data[] = $row;
    }
}

// 查询总数据量
$sql = "SELECT COUNT(*) AS total FROM products";
$result = $conn->query($sql);
$total = $result->fetch_assoc()["total"];

// 关闭数据库连接
$conn->close();

// 返回结果
$response = [
    "data" => $data,
    "total" => $total
];
echo json_encode($response);
?>

<template>
   <div>
      <table>
         <thead>
            <tr>
               <th>编号</th>
               <th>名称</th>
               <th>价格</th>
               <th>数量</th>
            </tr>
         </thead>
         <tbody>
            <tr v-for="item in data" :key="item.id">
               <td>{{item.id}}</td>
               <td>{{item.name}}</td>
               <td>{{item.price}}</td>
               <td>{{item.quantity}}</td>
            </tr>
         </tbody>
      </table>
      <div>
         <button @click="prevPage" :disabled="page <= 1">上一页</button>
         <button @click="nextPage" :disabled="page >= totalPages">下一页</button>
      </div>
   </div>
</template>

<script>
export default {
   data() {
      return {
         data: [],
         page: 1,
         pageSize: 10,
         totalPages: 0
      }
   },
   mounted() {
      this.getData();
   },
   methods: {
      getData() {
         axios.get('/api.php', {
            params: {
               page: this.page,
               pageSize: this.pageSize
            }
         })
         .then(response => {
            this.data = response.data.data;
            this.totalPages = Math.ceil(response.data.total / this.pageSize);
         })
         .catch(error => {
            console.log(error);
         });
      },
      prevPage() {
         if (this.page > 1) {
            this.page--;
            this.getData();
         }
      },
      nextPage() {
         if (this.page < this.totalPages) {
            this.page++;
            this.getData();
         }
      }
   }
}
</script>

<style scoped>
table {
   width: 100%;
}

th, td {
   padding: 8px;
   text-align: left;
}
</style>