mysqli 修改

<?php
$host = 'localhost';
$user = 'username';
$password = 'password';
$dbname = 'database_name';

// 创建连接
$conn = new mysqli($host, $user, $password, $dbname);

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

// 更新数据
$sql = "UPDATE users SET email = 'newemail@example.com' WHERE id = 1";
if ($conn->query($sql) === TRUE) {
    echo "记录更新成功";
} else {
    echo "Error updating record: " . $conn->error;
}

// 关闭连接
$conn->close();
?>

<?php
$host = 'localhost';
$user = 'username';
$password = 'password';
$dbname = 'database_name';

// 创建连接
$conn = mysqli_connect($host, $user, $password, $dbname);

// 检查连接
if (!$conn) {
    die("连接失败: " . mysqli_connect_error());
}

// 更新数据
$sql = "UPDATE users SET email = 'newemail@example.com' WHERE id = 1";
if (mysqli_query($conn, $sql)) {
    echo "记录更新成功";
} else {
    echo "Error updating record: " . mysqli_error($conn);
}

// 关闭连接
mysqli_close($conn);
?>