swooletcp如何获取下位机的16进制指令数据

//指令集的结尾是0xEF

$tcp_server = $serv->addlistener('0.0.0.0', 9503, SWOOLE_SOCK_TCP);

$tcp_server->set(array(

    'open_length_check' => true,

    'package_length_type' => 'N',

    'package_length_offset' => 0,

    'package_max_length' => 8192,

    //'package_body_offset' => 4,

    'open_eof_check' => true,

    'package_eof' => 0xEF

));

//连接已经成功,打印了Client:Connect

$tcp_server->on('connect', function ($serv, $fd){

    echo "Client:Connect\r\n";

});

//这是接收代码

$tcp_server->on('receive', function ($serv, $fd, $from_id, $data){

    //$buffer = str_split(bin2hex($data), 2);

    echo "开始接收数据^^^^";

    $buffer = bin2hex($data);

    var_dump($buffer);

    echo hexdec($buffer[0]);

    echo "!!!";

    echo hexdec($buffer[1]);



    echo "...";



    //取所有数组之和

    echo (hexdec($buffer[0])+hexdec($buffer[1]));

    //将十进制数转为二进制

    echo ( decbin (hexdec($buffer[0])+hexdec($buffer[1])));

    $a=decbin (hexdec($buffer[0])+hexdec($buffer[1]));

    echo ",,,,";

    //取最后1个字节

    echo substr($a,-8);

    //二进制转十进制

    echo "......";

    echo bindec(substr($a,-8));

    print($data);

    $data = json_decode($data, true);

    //已下省略业务代码

}