如何使用PHP和swoole进行高性能的推荐系统开发？

pecl install swoole

<?php
$server = new SwooleServer('0.0.0.0', 9501);

$server->on('connect', function ($server, $fd) {
    echo "Client {$fd}: connect
";
});

$server->on('receive', function ($server, $fd, $from_id, $data) {
    echo "Received data from client {$fd}: {$data}
";
    // 在这里进行推荐系统的处理逻辑
    // ...
    $server->send($fd, 'Hello, Client! This is the recommended content for you.');
});

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

$server->start();

// 处理推荐逻辑的函数
function recommend($data)
{
    // 解析请求数据
    $requestData = json_decode($data, true);

    // 根据请求数据，查询数据库或者其他数据源，获取推荐内容
    // ...

    // 将推荐结果打包成JSON格式，返回给客户端
    $recommendData = [
        'recommendation' => '...'
    ];
    return json_encode($recommendData);
}

<?php
$client = new SwooleClient(SWOOLE_SOCK_TCP);
if (!$client->connect('127.0.0.1', 9501)) {
    exit("Connect failed. Error: {$client->errCode}
");
}

$requestData = [
    'user' => '...',
    'item' => '...',
    // 其他请求数据
];
$client->send(json_encode($requestData));
$response = $client->recv();
echo "Recommendation: {$response}
";

$client->close();