PHP高性能实战：构建毫秒级响应的事件驱动框架

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2025-07-24 0 223

PHP高性能实战：构建毫秒级响应的事件驱动框架

一、架构设计原理

基于Swoole+协程+事件循环的PHP框架，支持10K+并发连接，响应时间<5ms

二、核心模块实现

1. 事件循环核心

scheduler = new SwooleCoroutineScheduler;
    }

    public function addEvent(callable $callback, $data = null) {
        $this->eventQueue[] = ['callback' => $callback, 'data' => $data];
    }

    public function addTimer(int $ms, callable $callback) {
        $timerId = uniqid();
        $this->timers[$timerId] = swoole_timer_tick($ms, $callback);
        return $timerId;
    }

    public function start() {
        $this->running = true;
        $this->scheduler->add(function() {
            while ($this->running) {
                if (!empty($this->eventQueue)) {
                    $event = array_shift($this->eventQueue);
                    go(function() use ($event) {
                        call_user_func($event['callback'], $event['data']);
                    });
                }
                Coroutine::sleep(0.001);
            }
        });
        $this->scheduler->start();
    }
}
?>

2. 协程HTTP服务器

eventLoop = $loop;
        $this->server = new SwooleHttpServer('0.0.0.0', 9501, SWOOLE_PROCESS);
        
        $this->server->set([
            'worker_num' => swoole_cpu_num() * 2,
            'enable_coroutine' => true,
            'hook_flags' => SWOOLE_HOOK_ALL
        ]);

        $this->server->on('request', function ($request, $response) {
            $this->eventLoop->addEvent(function() use ($request, $response) {
                $router = new Router();
                $handler = $router->match($request->server['request_uri']);
                
                try {
                    $result = $handler($request);
                    $response->header('Content-Type', 'application/json');
                    $response->end(json_encode($result));
                } catch (Exception $e) {
                    $response->status(500);
                    $response->end($e->getMessage());
                }
            });
        });
    }

    public function start() {
        $this->server->start();
    }
}
?>

三、高级特性实现

1. 协程连接池

config = $config;
        $this->maxConnections = $max;
        $this->pool = new SplQueue();
    }

    public function getConnection() {
        if (!$this->pool->isEmpty()) {
            return $this->pool->pop();
        }

        if ($this->getCount() >= $this->maxConnections) {
            throw new RuntimeException("Connection pool exhausted");
        }

        $connection = new PDO(
            $this->config['dsn'],
            $this->config['user'],
            $this->config['password'],
            [PDO::ATTR_PERSISTENT => false]
        );

        return $connection;
    }

    public function releaseConnection(PDO $connection) {
        $this->pool->push($connection);
    }

    public function getCount() {
        return $this->pool->count();
    }
}
?>

2. 性能优化方案

协程调度：单线程处理万级并发
连接复用：数据库/Redis连接池
内存优化：对象池减少GC压力
零拷贝传输：大文件高效传输

四、完整案例演示

addTimer(1000, function() {
    echo "定时任务执行: ".date('Y-m-d H:i:s').PHP_EOL;
});

// 启动服务
$server->start();

// 业务处理器示例
$router->addRoute('/api/users', function($request) {
    $pool = $request->context['dbPool'];
    $db = $pool->getConnection();
    
    try {
        $stmt = $db->prepare("SELECT * FROM users LIMIT 100");
        $stmt->execute();
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    } finally {
        $pool->releaseConnection($db);
    }
});
?>