???? ??? ?? ??? ???? ??? ?? ????? ??? ???? ????. Swoole? PHP ??? ???? ??? ??? ???? ?? ???? ???? ??? ???? ????? ???? ? ?? ??? ?? ???? ?? ???? ????.

???? Swoole? ???? ??? ???? ??? ????? ??? ?? ???? ????, Swoole? ?? ? ??? ?? ???? ??? ?? ?? ?? ?? ??? ???????.

1. Swoole ??

Swoole ??? ?? ?????. PHP ?? ?? ??? PECL? ???? ???. ???? ??? ??? ????.

$ pecl install swoole

??? ??? ? php.ini ??? ???? ?? ?? ??? ? swoole ??? ??????.

extension=swoole.so

2. ??? HTTP ?? ??

??? Swoole? ?? ???? ??? ? ??? ??? HTTP ??? ??? ?????.

<?php
$http = new swoole_http_server("127.0.0.1", 9501);

$http->on('request', function ($request, $response) {
    $response->header("Content-Type", "text/html; charset=utf-8");
    $response->end("<h1>Hello Swoole!</h1>");
});

$http->start();

????? ?? ??? ???? HTTP ??? ??? ? ????.

$ php server.php

?? ?? ?????? http://127.0.0.1:9501? ???? ??? ?????. ????? Swoole!. http://127.0.0.1:9501 即可看到輸出的 Hello Swoole!。

三、利用WebSocket實現實時通信

Swoole還支持使用WebSocket協議實現實時通信。下面我們將編寫一個簡單的聊天室應用，供大家了解Swoole的實時通信功能。

<?php
$ws = new swoole_websocket_server("127.0.0.1", 9502);

$ws->on('open', function ($ws, $request) {
    echo "client-{$request->fd} is connected
";
});

$ws->on('message', function ($ws, $frame) {
    echo "received message: {$frame->data}
";
    foreach($ws->connections as $fd) {
        $ws->push($fd, $frame->data);
    }
});

$ws->on('close', function ($ws, $fd) {
    echo "client-{$fd} is closed
";
});

$ws->start();

我們可以在終端中執(zhí)行以下命令，啟動WebSocket服務器：

$ php chatroom.php

然后，在瀏覽器中訪問 http://localhost:8080 ，打開JavaScript控制臺，執(zhí)行以下代碼：

let ws = new WebSocket('ws://127.0.0.1:9502');

ws.onopen = function() {
    console.log('WebSocket is connected.');
};

ws.onmessage = function(event) {
    console.log(`received message: ${event.data}`);
};

ws.onclose = function() {
    console.log('WebSocket is closed.');
};

ws.send('hello world');

此時，我們就可以在JavaScript控制臺中看到收到了服務端發(fā)送的消息。在瀏覽器中打開多個標簽頁，我們就可以看到一個簡單的聊天室效果。

四、利用協程提高并發(fā)能力

Swoole支持利用協程提高并發(fā)處理能力。下面我們將編寫一個簡單的協程應用，供大家了解Swoole的協程功能。

<?php
Coun(function() {
    $result1 = Co::exec('ls');
    $result2 = Co::exec('pwd');
    $result3 = Co::exec('date');
    
    echo "result1: {$result1[0]}
";
    echo "result2: {$result2[0]}
";
    echo "result3: {$result3[0]}
";
});

我們可以在終端中執(zhí)行以下命令，運行協程應用：

$ php coroutine.php

此時，我們可以看到執(zhí)行結果，分別對應了執(zhí)行 ls、pwd 和 date

3. WebSocket? ???? ??? ?? ??

Swoole? ??? ??? ?? WebSocket ???? ??? ?????. ????? ?? ??? Swoole? ??? ?????? ??? ??? ? ??? ??? ??? ??????? ???????. ??rrreee??????? ?? ??? ???? WebSocket ??? ??? ? ????. ??rrreee???? ?? ?????? http://localhost:8080? ???? JavaScript ??? ?? ??? ?????. ?? ??? ??rrreee??? ???? ???? ?? ???? ???? ?? JavaScript ???? ??? ? ????. ?????? ?? ?? ?? ??? ??? ??? ? ? ????. ????4. ???? ???? ??? ?? ??????Swoole? ??? ?? ??? ????? ?? ??? ??? ?????. ????? ?? ??? Swoole? ??? ??? ??? ? ??? ??? ??? ??????? ???????. ??rrreee????? ??????? ???? ?? ????? ?? ??? ??? ? ????. ??rrreee???? ls ? ? ??? ???? ?? ??? ? ? ????. pwd ? date ?? ??. ????? ??? Swoole? ?? ?? ?????. ??? ??? ?? HTTP, WebSocket, Coroutine ? Swoole? ?? ?? ???? ?????. ??? ??? ?? ??? Swoole? ?? ???? ??? ??? ???? ??? ??? ? ??? ????. ?? ?? ????? ? ??? ??? ? ??? ?? ????? ??? ? ???, ?? ???? ???? ??? ??? ?????. ??

? ??? Swoole? ???? ??? ???? ??? ???? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!