Swoole-1.8.0 版本已发布,此版本是一个里程碑式新版本,新增了多项新特性、多项核心功能优化以及问题修复、移除了无效的特性。更新内容如下:
客户端
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增加原生异步 MySQL 客户端
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增加原生异步 Redis 客户端,基于 Redis 官方提供的 hiredis 库
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增加原生异步 Http 客户端
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增加原生异步 WebSocket 客户端支持
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重构底层 swClient,异步 TCP 客户端实现放到 swoole 内核中
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增加 swoole_client->reuse 属性,SWOOLE_KEEP 长连接模式下标识是否为复用的连接
服务器端
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重构 websocket 服务器代码,底层与 length_check 协议复用相同的处理函数,增强稳定性
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增加 Task 进程对 tick/after 定时器的支持,底层基于高精度的 setitimer+ 信号实现
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保存构造函数中传入的 host、port 参数到 swoole_server 对象属性
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增加多端口多协议的支持(重要更新)
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增加 swoole_server->defer 函数用于延时执行一些函数
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增加 swoole_server->close 强制切断连接的选项,设置第二个参数会 true 会清空发送队列并立即切断连接
多端口多协议示例:
$serv = new swoole_server("0.0.0.0", 9501);$port2 = $serv->listen('127.0.0.1', 9502, SWOOLE_SOCK_TCP);$port2->set(array( 'open_length_check' => true, 'package_length_type' => 'N', 'package_length_offset' => 0, //第N个字节是包长度的值 'package_body_offset' => 4, //第几个字节开始计算长度 'package_max_length' => 2000000, //协议最大长度));$port2->on('receive', function (swoole_server $serv, $fd, $from_id, $data) { echo "ServerPort2\n";});$serv->on('connect', function ($serv, $fd, $from_id){ echo "[#".posix_getpid()."]\tClient@[$fd:$from_id]: Connect.\n";});$serv->on('receive', function (swoole_server $serv, $fd, $from_id, $data) { echo "[#".$serv->worker_id."]\tClient[$fd]: $data\n"; if ($serv->send($fd, "hello\n") == false) { echo "error\n"; }});$serv->on('close', function ($serv, $fd, $from_id) { echo "[#".posix_getpid()."]\tClient@[$fd:$from_id]: Close.\n";});$serv->start();
其他
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增加swoole_table对key值的存储,foreach遍历table时可以获取到key值
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更改swoole_table的key对比模式,从crc32比对改为直接进行字符串对比
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更新utlist.h库到1.9.9版本
swoole_table保存Key值会增加内存占用,如table的size为100万,KEY值存储会增加64M内存占用
问题修复
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修复启用消息队列后发生double-free问题
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重构定时器,修复after、tick定时器偶然出现的core dump的问题
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定时器使用最小堆数据结构,插入/删除时间复杂度为log(N)
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修复swoole_process::signal在PHP7下发生core dump的问题
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修复swoole_async_write在PHP7下发生core dump的问题
移除特性
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移除未支持的特性相关历史遗留代码,如heartbeat_ping、dispatch_key_type等
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移除swoole_server->addtimer、swoole_server->deltimer、swoole_server->gettimer
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移除swoole_timer_add、swoole_timer_del
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移除swoole_server的onTimer事件
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移除task_worker_max配置及相关特性代码
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移除swoole_server->handler方法

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In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.

Fibers was introduced in PHP8.1, improving concurrent processing capabilities. 1) Fibers is a lightweight concurrency model similar to coroutines. 2) They allow developers to manually control the execution flow of tasks and are suitable for handling I/O-intensive tasks. 3) Using Fibers can write more efficient and responsive code.

The PHP community provides rich resources and support to help developers grow. 1) Resources include official documentation, tutorials, blogs and open source projects such as Laravel and Symfony. 2) Support can be obtained through StackOverflow, Reddit and Slack channels. 3) Development trends can be learned by following RFC. 4) Integration into the community can be achieved through active participation, contribution to code and learning sharing.

PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

PHP is not dying, but constantly adapting and evolving. 1) PHP has undergone multiple version iterations since 1994 to adapt to new technology trends. 2) It is currently widely used in e-commerce, content management systems and other fields. 3) PHP8 introduces JIT compiler and other functions to improve performance and modernization. 4) Use OPcache and follow PSR-12 standards to optimize performance and code quality.

The future of PHP will be achieved by adapting to new technology trends and introducing innovative features: 1) Adapting to cloud computing, containerization and microservice architectures, supporting Docker and Kubernetes; 2) introducing JIT compilers and enumeration types to improve performance and data processing efficiency; 3) Continuously optimize performance and promote best practices.


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