PHP试图简化涉及行集的重复脚本

<?php
// 数据库连接配置
$host = 'localhost';
$db   = 'testdb';
$user = 'username';
$pass = 'password';
$charset = 'utf8mb4';

$dsn = "mysql:host=$host;dbname=$db;charset=$charset";
$options = [
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    PDO::ATTR_EMULATE_PREPARES   => false,
];

try {
     $pdo = new PDO($dsn, $user, $pass, $options);
} catch (\PDOException $e) {
     throw new \PDOException($e->getMessage(), (int)$e->getCode());
}

// 获取数据的函数
function fetchData($pdo, $query, $params = []) {
    $stmt = $pdo->prepare($query);
    $stmt->execute($params);
    return $stmt->fetchAll();
}

// 使用函数获取并显示数据
$data = fetchData($pdo, 'SELECT * FROM users WHERE active = :active', [':active' => 1]);
foreach ($data as $row) {
    echo "ID: {$row['id']} - Name: {$row['name']}<br>";
}
?>