分散データベースを使用して PHP の同時実行性の高さの問題を解決する方法

 new PDO('mysql:host=shard1.server.com;dbname=mydb', 'username', 'password'),
    'shard2' => new PDO('mysql:host=shard2.server.com;dbname=mydb', 'username', 'password'),
];

// 根据用户ID获取数据库分片
function getShard($userId, $shards) {
    $shardCount = count($shards);
    $shardId = $userId % $shardCount;
    return $shards["shard" . ($shardId + 1)];
}

// 查询用户信息
function getUserInfo($userId, $shards) {
    $shard = getShard($userId, $shards);
    $stmt = $shard->prepare("SELECT * FROM users WHERE id = :userId");
    $stmt->bindParam(':userId', $userId);
    $stmt->execute();
    return $stmt->fetch(PDO::FETCH_ASSOC);
}

// 更新用户信息
function updateUserInfo($userId, $data, $shards) {
    $shard = getShard($userId, $shards);
    $stmt = $shard->prepare("UPDATE users SET name = :name, age = :age WHERE id = :userId");
    $stmt->bindParam(':userId', $userId);
    $stmt->bindParam(':name', $data['name']);
    $stmt->bindParam(':age', $data['age']);
    $stmt->execute();
    return true;
}

?>

prepare("SELECT * FROM users WHERE id = :userId");
    $stmt->bindParam(':userId', $userId);
    $stmt->execute();
    return $stmt->fetch(PDO::FETCH_ASSOC);
}

// 更新用户信息
function updateUserInfo($userId, $data, $master) {
    $stmt = $master->prepare("UPDATE users SET name = :name, age = :age WHERE id = :userId");
    $stmt->bindParam(':userId', $userId);
    $stmt->bindParam(':name', $data['name']);
    $stmt->bindParam(':age', $data['age']);
    $stmt->execute();
    return true;
}

?>