php mysql处理高并发

// 示例代码：使用PDO连接池
try {
    $pdo = new PDO('mysql:host=localhost;dbname=test', 'user', 'password');
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
    echo "数据库连接失败: " . $e->getMessage();
}

// 示例代码：使用Redis缓存
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
$redis->set('key', 'value');
$value = $redis->get('key');

// 示例代码：使用RabbitMQ发送消息
$connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');
$channel = $connection->channel();
$channel->queue_declare('hello', false, false, false, false);
$msg = new AMQPMessage('Hello World!');
$channel->basic_publish($msg, '', 'hello');
echo " [x] Sent 'Hello World!'\n";
$channel->close();
$connection->close();