PHP 데이터베이스 연결의 다중 저장소 관리 및 접근 제어

// 数据库1的配置
$db1_config = array(
    'type' => 'mysql',
    'host' => 'localhost',
    'database' => 'db1',
    'username' => 'user1',
    'password' => 'pass1'
);

// 数据库2的配置
$db2_config = array(
    'type' => 'mysql',
    'host' => 'localhost',
    'database' => 'db2',
    'username' => 'user2',
    'password' => 'pass2'
);

class Database {
    private $pdo;
    
    public function __construct($db_config) {
        $dsn = $db_config['type'] . ':host=' . $db_config['host'] . ';dbname=' . $db_config['database'];
        $username = $db_config['username'];
        $password = $db_config['password'];
        
        $this->pdo = new PDO($dsn, $username, $password);
        $this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    }
    
    // 执行SQL语句
    public function query($sql) {
        return $this->pdo->query($sql);
    }
    
    // 插入数据
    public function insert($table, $data) {
        // 省略插入数据的代码
    }
    
    // 更新数据
    public function update($table, $data, $where) {
        // 省略更新数据的代码
    }
    
    // 删除数据
    public function delete($table, $where) {
        // 省略删除数据的代码
    }
    
    // 关闭数据库连接
    public function close() {
        $this->pdo = null;
    }
}

class DatabaseManager {
    private $databases;
    
    public function __construct() {
        $this->databases = array();
    }
    
    // 添加数据库连接
    public function addDatabase($name, $db_config) {
        $database = new Database($db_config);
        $this->databases[$name] = $database;
    }
    
    // 获取数据库连接
    public function getDatabase($name) {
        if (isset($this->databases[$name])) {
            return $this->databases[$name];
        }
        
        return null;
    }
    
    // 关闭所有数据库连接
    public function closeAll() {
        foreach ($this->databases as $database) {
            $database->close();
        }
    }
}

// 创建数据库管理对象
$databaseManager = new DatabaseManager();

// 添加数据库连接
$databaseManager->addDatabase('db1', $db1_config);
$databaseManager->addDatabase('db2', $db2_config);

// 获取数据库连接
$db1 = $databaseManager->getDatabase('db1');
$db2 = $databaseManager->getDatabase('db2');

// 使用数据库连接执行操作
$result1 = $db1->query('SELECT * FROM table1');
$result2 = $db2->query('SELECT * FROM table1');

// 关闭所有数据库连接
$databaseManager->closeAll();