swoole_redis_channel.php

<?php

use Swoole\Http\Server;
use Swoole\Coroutine\Channel;
use Swoole\Coroutine\Redis;

$server = new Server('0.0.0.0', 8000);

$chan = new Channel(100);

$server->on(
    'WorkerStart',
    function (Server $server) use ($chan) {
        for ($i = 0; $i < 100; $i++) {
            $redis = new Redis();
            $redis->connect('127.0.0.1', 6379);
            $chan->push($redis);
        }
    }
);

$server->on(
    'request',
    function ($request, $response) use ($chan) {
        /** @var Redis $redis */
        $redis = $chan->pop();

        $redis->set('swoole', rand(1, 100));
        $result = $redis->get('swoole');

        $response->end("<h1>Hello World. #{$result}</h1>");

        // return connection to the channel
        $chan->push($redis);
    }
);

$server->start();