php-swoole/server.php

#!/usr/bin/env php
<?php

use Swoole\WebSocket\Server;
use Swoole\WebSocket\Frame;

$server = new Server('0.0.0.0', 9501);

$server->on('message', function (Server $server, Frame $mensagem) {
    $conexoes = $server->connections;
    $origem = $mensagem->fd;

    foreach ($conexoes as $conexao) {
        if($conexao === $origem) continue;
    $server->push($conexao, json_encode(['type' => 'chat', 'text' => $mensagem->data])
);
}
});

$server->start();