php显示mysql数据库中的数据

<?php
// 连接到MySQL数据库
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$database = "your_database";
$conn = new mysqli($servername, $username, $password, $database);

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

// 执行查询语句
$sql = "SELECT * FROM your_table";
$result = $conn->query($sql);

// 处理查询结果
if ($result->num_rows > 0) {
    // 输出数据
    echo "<ul>";
    while($row = $result->fetch_assoc()) {
        echo "<li>" . $row["column_name"] . "</li>";
    }
    echo "</ul>";
} else {
    echo "没有找到数据";
}

// 关闭连接
$conn->close();
?>