如何在PHP中创建可编辑的表值

<?php
// 连接数据库
$servername = "数据库服务器地址";
$username = "数据库用户名";
$password = "数据库密码";
$dbname = "数据库名";

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

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

// 查询表值
$sql = "SELECT * FROM users";
$result = $conn->query($sql);

// 显示表格
if ($result->num_rows > 0) {
    echo "<table>";
    echo "<tr><th>ID</th><th>Name</th><th>Email</th></tr>";
    while ($row = $result->fetch_assoc()) {
        echo "<tr>";
        echo "<td>" . $row["id"] . "</td>";
        echo "<td><input type='text' name='name' value='" . $row["name"] . "'></td>";
        echo "<td><input type='text' name='email' value='" . $row["email"] . "'></td>";
        echo "</tr>";
    }
    echo "</table>";
} else {
    echo "没有找到记录";
}

// 处理表单提交
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $id = $_POST["id"];
    $name = $_POST["name"];
    $email = $_POST["email"];

    // 更新数据库
    $sql = "UPDATE users SET name='$name', email='$email' WHERE id='$id'";
    if ($conn->query($sql) === TRUE) {
        echo "更新成功";
    } else {
        echo "更新失败: " . $conn->error;
    }
}

// 关闭数据库连接
$conn->close();
?>