Swoole创建TCP客户端异步-2

index.php文件
$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);