php链接mysql更新密码

<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

// 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);
}

// 更新密码
$user_id = 1;
$new_password = password_hash("new_password", PASSWORD_DEFAULT);
$sql = "UPDATE users SET password = ? WHERE id = ?";

$stmt = $conn->prepare($sql);
$stmt->bind_param("si", $new_password, $user_id);

if ($stmt->execute()) {
    echo "密码更新成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$stmt->close();
$conn->close();
?>

<?php
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $user_id = 1;
    $new_password = password_hash("new_password", PASSWORD_DEFAULT);
    $sql = "UPDATE users SET password = :password WHERE id = :id";

    $stmt = $conn->prepare($sql);
    $stmt->bindParam(':password', $new_password);
    $stmt->bindParam(':id', $user_id);

    if ($stmt->execute()) {
        echo "密码更新成功";
    } else {
        echo "Error: " . $sql . "<br>" . $conn->errorInfo();
    }
} catch(PDOException $e) {
    echo "连接失败: " . $e->getMessage();
}

$conn = null;
?>