连接迭代器

1.10.0或更高版本，提供了监听端口迭代器，可以只遍历当前服务器端口所维持的TCP连接，而不是遍历所有端口的连接。

连接迭代器依赖pcre库

4.1.0以上版本移除了pcre依赖

$server = new swoole_websocket_server("0.0.0.0", 9514, SWOOLE_BASE);
$server->set([
    'enable_static_handler' => true,
    'document_root' => __DIR__ . '/web',
]);
$tcp = $server->listen("0.0.0.0", 9515, SWOOLE_SOCK_TCP);
$tcp->set([
    'open_length_check' => true,
    'package_max_length' => 2 * 1024 * 1024,
    'package_length_type' => 'N',
    'package_body_offset' => 16,
    'package_length_offset' => 0,
]);
$server->on("open", function ($serv, $req) {
    echo "new WebSocket Client, fd={$req->fd}\n";
});
$tcp->on('receive', function ($server, $fd, $reactor_id, $data) {
    $body = substr($data, 16);
    $value = swoole_serialize::unpack($body);
    //仅遍历 9514 端口的连接
    $websocket = $server->ports[0];
    foreach ($websocket->connections as $_fd)
    {
        if ($server->exist($_fd))
        {
            $server->push($_fd, json_encode($value));
        }
    }
});
$server->start();