php数据修改

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

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

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

// 更新用户电子邮件地址
$id = 1;
$new_email = "newemail@example.com";
$sql = "UPDATE users SET email='$new_email' WHERE id=$id";

if ($conn->query($sql) === TRUE) {
    echo "记录更新成功";
} else {
    echo "错误: " . $sql . "<br>" . $conn->error;
}

// 关闭连接
$conn->close();
?>

$stmt = $conn->prepare("UPDATE users SET email=? WHERE id=?");
$stmt->bind_param("si", $new_email, $id);
$stmt->execute();