PHPでデータベースを操作するにはどうすればよいですか?

<?php
// 连接 MySQL 数据库
$link = mysqli_connect("localhost", "username", "password", "database_name");
 
// 检查连接是否成功
if ($link === false) {
    die("Error: Could not connect. " . mysqli_connect_error());
}
 
// 查询 users 表中的所有数据
$sql = "SELECT * FROM users";
if ($result = mysqli_query($link, $sql)) {
    // 打印结果
    if (mysqli_num_rows($result) > 0) {
        while ($row = mysqli_fetch_array($result)) {
            echo $row['id'] . " " . $row['name'] . " " . $row['email'];
            echo "<br>";
        }
        // 释放结果集资源
        mysqli_free_result($result);
    } else {
        echo "No records found.";
    }
} else {
    echo "Error: Could not able to execute $sql. " . mysqli_error($link);
}
 
// 关闭连接
mysqli_close($link);
?>

<?php
// 连接 MySQL 数据库
$dsn = "mysql:host=localhost;dbname=database_name";
$username = "username";
$password = "password";
 
// 创建 PDO 实例
try {
    $pdo = new PDO($dsn, $username, $password);
} catch (PDOException $e) {
    die("Error: Could not connect. " . $e->getMessage());
}
 
// 查询 users 表中的所有数据
$sql = "SELECT * FROM users";
if ($result = $pdo->query($sql)) {
    // 打印结果
    if ($result->rowCount() > 0) {
        while ($row = $result->fetch()) {
            echo $row['id'] . " " . $row['name'] . " " . $row['email'];
            echo "<br>";
        }
    } else {
        echo "No records found.";
    }
} else {
    echo "Error: Could not able to execute $sql. " . $pdo->errorInfo();
}
 
// 关闭连接
$pdo = null;
?>

<?php
// 引入 Eloquent ORM 类
require_once "vendor/autoload.php";
 
use IlluminateDatabaseCapsuleManager as Capsule;

// 创建 Eloquent ORM 实例
$capsule = new Capsule;
 
// 配置数据库连接信息
$capsule->addConnection([
    "driver" => "mysql",
    "host" => "localhost",
    "database" => "database_name",
    "username" => "username",
    "password" => "password",
]);
 
// 启动 Eloquent ORM
$capsule->bootEloquent();
 
// 查询 users 表中的所有数据
$users = Capsule::table("users")->get();
 
// 打印结果
if (count($users) > 0) {
    foreach ($users as $user) {
        echo $user->id . " " . $user->name . " " . $user->email;
        echo "<br>";
    }
} else {
    echo "No records found.";
}
?>