// Server
class Server
{
    private $serv;

    public function __construct() {
        $this->serv = new swoole_server("0.0.0.0", 9501);
        $this->serv->set(array(
            worker_num => 8,
            daemonize => false,
            max_request => 10000,
            dispatch_mode => 2,
            debug_mode=> 1
        ));

        $this->serv->on(Start, array($this, onStart));
        $this->serv->on(Connect, array($this, onConnect));
        $this->serv->on(Receive, array($this, onReceive));
        $this->serv->on(Close, array($this, onClose));

        $this->serv->start();
    }

    public function onStart( $serv ) {
        echo "Start
";
    }

    public function onConnect( $serv, $fd, $from_id ) {
        $serv->send( $fd, "Hello {$fd}!" );
    }

    public function onReceive( swoole_server $serv, $fd, $from_id, $data ) {
        echo "Get Message From Client {$fd}:{$data}
";
    }

    public function onClose( $serv, $fd, $from_id ) {
        echo "Client {$fd} close connection
";
    }
}
// 启动服务器
$server = new Server();

<?php
class Client
{
    private $client;

    public function __construct() {
        $this->client = new swoole_client(SWOOLE_SOCK_TCP);
    }

    public function connect() {
        if( !$this->client->connect("127.0.0.1", 9501 , 1) ) {
            echo "Error: {$fp->errMsg}[{$fp->errCode}]
";
        }
        $message = $this->client->recv();
        echo "Get Message From Server:{$message}
";

        fwrite(STDOUT, "请输入消息：");  
        $msg = trim(fgets(STDIN));
        $this->client->send( $msg );
    }
}

$client = new Client();
$client->connect();