使用php从mysql中获取并显示多行和多列

<?php
// 连接到MySQL数据库
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 执行查询语句
$sql = "SELECT column1, column2, column3 FROM your_table";
$result = $conn->query($sql);

// 获取查询结果并显示数据
if ($result->num_rows > 0) {
    echo "<table>";
    echo "<tr><th>Column 1</th><th>Column 2</th><th>Column 3</th></tr>";
    while ($row = $result->fetch_assoc()) {
        echo "<tr>";
        echo "<td>" . $row["column1"] . "</td>";
        echo "<td>" . $row["column2"] . "</td>";
        echo "<td>" . $row["column3"] . "</td>";
        echo "</tr>";
    }
    echo "</table>";
} else {
    echo "没有数据";
}

// 关闭数据库连接
$conn->close();
?>