php留言板分页

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

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

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 获取当前页码和每页显示的数据条数
$page = isset($_GET['page']) ? intval($_GET['page']) : 1;
$limit = 10;

// 计算总页数
$sql = "SELECT COUNT(*) as total FROM messages";
$result = $conn->query($sql);
$row = $result->fetch_assoc();
$total = $row['total'];
$totalPages = ceil($total / $limit);

// 计算当前页的偏移量
$offset = ($page - 1) * $limit;

// 查询当前页的数据
$sql = "SELECT * FROM messages ORDER BY id DESC LIMIT $limit OFFSET $offset";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "ID: " . $row["id"]. " - Message: " . $row["message"]. "<br>";
    }
} else {
    echo "0 结果";
}

// 分页导航
echo "<div>";
for ($i = 1; $i <= $totalPages; $i++) {
    echo "<a href='?page=$i'>$i</a> ";
}
echo "</div>";

$conn->close();
?>