[李景山php] 异步tcp 客户端 swoole

$client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC);//注册连接成功回调$client->on("connect", function($cli) {    $cli->send("hello world\n");});//注册数据接收回调$client->on("receive", function($cli, $data){    echo "Received: ".$data."\n";});//注册连接失败回调$client->on("error", function($cli){    echo "Connect failed\n";});//注册连接关闭回调$client->on("close", function($cli){    echo "Connection close\n";});//发起连接$client->connect('127.0.0.1', 9501, 0.5);