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# 协程tcp/udp客户端 ```php $client = new Swoole\Coroutine\Client(SWOOLE_SOCK_TCP); if (!$client->connect('127.0.0.1', 9501, 0.5)) { exit("connect failed. Error: {$client->errCode}\n"); } $client->send("hello world\n"); echo $client->recv(); $client->close();