摘要：進程可以使用函數向進程投遞新的任務。當前的進程在調用回調函數時會將進程狀態切換為忙碌，這時將不再接收新的，當函數返回時會將進程狀態切換為空閑然后繼續接收新的。當進程投遞的任務在中完成時，進程會通過方法將任務處理的結果發送給進程。

下載swoole源碼：git clone https://gitee.com/swoole/swoole.git

通過phpize（擴展php擴展模塊，建立php外掛模塊）：

cd swoole

執行：your/phpize/path

./configure --with-php-config=your/php/path/bin/php-config

make && make install

可以看到swoole.so的位置

我的位置是：/opt/soft/php/lib/php/extensions/no-debug-non-zts-20170718/

配置php.ini

添加extension=swoole.so

通過php -m命令，可以看到php的擴展模塊

檢測swoole安裝成功并且php支持swoole

cd your/swoole/path/examples/server

php echo.php（如果進程被阻塞，則說明成功）

netstat -anp | grep 9501（查看swoole開啟的端口號）

學習swoole需要去翻閱文檔，swoole文檔

tcp服務端（tcp_server.php）

//創建Server對象，監聽 127.0.0.1:9501端口
$serv = new swoole_server("127.0.0.1", 9501);

$serv->set([
    "worker_num" => 4, // worker進程數，cpu 1-4倍
    "max_request" => 100,
]);

/**
 * 監聽連接進入事件
 * $fd 客戶端連接服務端的唯一標識
 * $reactor_id 線程id
 */
$serv->on("connect", function ($serv, $fd, $reactor_id) {
    echo "Client: {$fd} - {$reactor_id} - Connect.
";
});

//監聽數據接收事件
$serv->on("receive", function ($serv, $fd, $reactor_id, $data) {
    $serv->send($fd, "Server: ".$data);
});

//監聽連接關閉事件
$serv->on("close", function ($serv, $fd) {
    echo "Client: Close.
";
});

//啟動服務器
$serv->start();

tcp客戶端（tcp_client.php）

// 創建tcp客戶端
$client = new swoole_client(SWOOLE_SOCK_TCP);

// 連接tcp服務端
if (!$client->connect("127.0.0.1", 9501)) {
    echo "連接失敗";
    exit;
}

// php cli
fwrite(STDOUT, "請輸入：");
$msg = trim(fgets(STDIN));

// 發送消息給tcp服務端
if (!$client->send($msg)) {
    echo "發送消息失敗";
    exit;
}

// 接收
$result = $client->recv();
echo $result;

匿名函數

$server->on("Request", function ($req, $resp) {
    echo "hello world";
});

類靜態方法

class A
{
    static function test($req, $resp)
    {
        echo "hello world";
    }
}
$server->on("Request", "A::Test");
$server->on("Request", array("A", "Test"));

函數

function my_onRequest($req, $resp)
{
    echo "hello world";
}
$server->on("Request", "my_onRequest");

對象方法

class A
{
    function test($req, $resp)
    {
        echo "hello world";
    }
}

$object = new A();
$server->on("Request", array($object, "test"));

小技巧：查看開啟的worker進程：ps aft | grep tcp_server.php

// 監聽所有地址和9501端口
$http = new swoole_http_server("0.0.0.0", 9501);

// 動靜分離配置
$http->set([
    // 開啟靜態請求
    "enable_static_handler" => true,
    // 靜態資源目錄
    "document_root" => "/opt/app/code1/",
]);

$http->on("request", function ($request, $response) {
    // 獲取get請求的參數
    $param = json_encode($request->get);
    // 設置cookie
    $response->cookie("name", "ronaldo", time() + 1800);
    // 輸出到頁面
    $response->end("
Hello Swoole - {$param}
");
});

// 開啟http服務
$http->start();

websocket服務端（websocket_server.php）

// 監聽所有地址和9502端口
$server = new swoole_websocket_server("0.0.0.0", 9502);

// 動靜分離配置
$server->set([
    // 開啟靜態請求
    "enable_static_handler" => true,
    // 靜態資源目錄
    "document_root" => "/opt/app/swoole/websocket",
]);
$server->on("open", function ($server, $request) {
    echo "server：handshake success with fd - {$request->fd}
";
});

$server->on("message", function ($server, $frame) {
    echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}
";
    $server->push($frame->fd, "this is server");
});

$server->on("close", function ($server, $fd) {
    echo "client - {$fd} - close
";
});

$server->start();

websocket客戶端 （websockt_client.html）

// 創建websocket實例
        var websocketURL = "ws://www.rona1do.top:9502";
        var websocket = new WebSocket(websocketURL);

        // 實例化對象的onopen屬性
        websocket.onopen = function (ev) {
            websocket.send("hello-websocket");
            console.log("connect-swoole-success");
        }

        // 實例化對象的onmessage屬性，接收服務端返回的數據
        websocket.onmessage = function (ev) {
            console.log("websockect-server-return-data：" + ev.data);
        }

        // close
        websocket.onclose = function (ev) {
            console.log("close");
        }

class WebSocket {
    const HOST = "0.0.0.0";
    const PORT = 9502;

    private $ws = null;

    function __construct()
    {
        $this->ws = new swoole_websocket_server(self::HOST, self::PORT);
        $this->ws->on("open", [$this, "onOpen"]);
        $this->ws->on("message", [$this, "onMessage"]);
        $this->ws->on("close", [$this, "onClose"]);
        $this->ws->start();
    }

    // 監聽websocket連接事件
    function onOpen($server, $request) {
        echo "server: handshake success with fd{$request->fd}
";
    }

    // 監聽websocket消息接收事件
    function onMessage($server, $frame) {
        echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}
";
        $server->push($frame->fd, "this is server");
    }

    // 監聽客戶端關閉事件
    function onClose($server, $fd) {
        echo "Client：{$fd} closes
";
    }
}

onTask：在task_worker進程內被調用。worker進程可以使用swoole_server_task函數向task_worker進程投遞新的任務。當前的Task進程在調用onTask回調函數時會將進程狀態切換為忙碌，這時將不再接收新的Task，當onTask函數返回時會將進程狀態切換為空閑然后繼續接收新的Task。

onFinish：當worker進程投遞的任務在task_worker中完成時，task進程會通過swoole_server->finish()方法將任務處理的結果發送給worker進程。

class Websocket {

    const HOST = "0.0.0.0";
    const PORT = 9502;
    private $ws = null;

    public function __construct()
    {
        $this->ws = new swoole_websocket_server(self::HOST, self::PORT);
        $this->ws->set([
            "worker_num" => 2,
            "task_worker_num" => 2, // 要想使用task必須要指明
        ]);
        $this->ws->on("open", [$this, "onOpen"]);
        $this->ws->on("message", [$this, "onMessage"]);
        $this->ws->on("task", [$this, "onTask"]);
        $this->ws->on("finish", [$this, "onFinish"]);
        $this->ws->on("close", [$this, "onClose"]);
        $this->ws->start();
    }

    public function onOpen($server, $request)
    {
        echo "server：handshake success with fd：{$request->fd}
";
    }

    public function onMessage($server, $frame)
    {
        echo "receive from {$frame->fd}:{$frame->data}
";

        // 需要投遞的任務數據
        $data = [
            "fd" => $frame->fd,
            "msg" => "task",
        ];
        $server->task($data);

        $server->push($frame->fd, "this is server");
    }

    // 處理投遞的任務方法，非阻塞
    public function onTask($server, $task_id, $worker_id, $data)
    {
        print_r($data);
        // 模擬大量數據的操作
        sleep(10);
        return "task_finish";
    }
    
    // 投遞任務處理完畢調用的方法
    public function onFinish($server, $task_id, $data)
    {
        echo "task_id:{$task_id}
";
        echo "task finish success:{$data}
";
    }
    
    public function onClose($server, $fd)
    {
        echo "Client：close";
    }
}