高手来,关于php中socket的有关问题

高手来,关于php中socket的问题!
一个硬件往服务器端口上发送数据（抓包软得到的是正确的16进制），通过抓包软件抓取的数据是正常的(16进制)，然而通过php的socket接受到的数据（通过转换后也是16进制，未转换是乱码），下面贴上代码，请高手帮忙看下哪里错了。为什么php的socket获取的数据和抓包软件获取的不一样

通过抓包软件获取的正确代码是（16进制的):FA 01 01 FF AA 03 00 01 00 0B 00 00 00 A3
通过php socket获得的数据（通过dechex(），ord()转换后的，和软件抓取的不一样，是错误的）：fa 7 25 2 fa 2 0 9 f6 4 2c 88 fa 1

下面贴上php的socket代码：

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?phperror_reporting (E_ALL);set_time_limit(0);ini_set("allow_call_time_pass_reference",true);//监听端口$PORT = 8888;//最大连接池$MAX_USERS = 50000;//创建监听端口//$sock = socket_create_listen($PORT);$commonProtocol = getprotobyname("tcp");$sock = socket_create(AF_INET, SOCK_STREAM, $commonProtocol);@socket_bind($sock, '192.168.1.101', 8888);@socket_listen($sock);if (!$sock){    exit(1);}//不阻塞socket_set_nonblock($sock);$connections = array();$input = array();$close = array();while (true){    //sleep(3);    $readfds = array_merge($connections, array($sock));    $writefds = array();    //选择一个连接，获取读、写连接通道    if (socket_select($readfds, $writefds, $e = null, $t=60))    {        foreach ($readfds as $rfd)        {            //如果是当前服务端的监听连接            if ($rfd == $sock)            {                //接受客户端连接                $newconn = socket_accept($sock);                $i = (int)$newconn;                $reject = '';                if (count($connections) >= $MAX_USERS)                {                    $reject = "Server full. Try again later.\n";                                   }                                //将当前客户端连接放如socket_select选择                $connections[$i] = $newconn;                //输入的连接资源缓存容器                $writefds[$i] = $newconn;                               //连接不正常                if ($reject)                {                                      $close[$i] = true;                }                else                {                    echo "Welcome to the PHP Chat Server!\n";                                  }                               //初始化当前连接读取内容的缓存容器                $input[$i] = "";                continue;            }            //客户端连接            $i = (int)$rfd;            //读取            $tmp = @socket_read($rfd, 14, PHP_NORMAL_READ);            if (!$tmp)            {                //读取不到内容                              print "connection closed on socket $i\n";                close($i);                continue;            }            $input[$i] .= $tmp;            $tmp = substr($input[$i], -1);            /*if ($tmp != "\r" && $tmp != "\n")            {                // no end of line, more data coming                continue;            }*/            $line = trim($input[$i]);            $input[$i] = "";            echo 'Client >>'.$line."\r\n";                                                $data=str_split($line);  print_r($data); echo "\r\n";                        //$data = explode("\t",$line);            //$data=str_split($data);            foreach($data as $v){             echo dechex(ord($v))."\t";                          }             echo "\r\n";                                                            socket_getpeername($connections[$i],&$remoteIP,&$remotePort);echo $remoteIP."\r\n";echo $remotePort."\r\n";//$data=str_split($buffer);//print_r($data);$str="\xFA\x01\x01\xFF\xAA\xAA\x00\x01\x00\x00\x00\x00\x00\x01"; socket_send($connections[$i],$str,strlen($str),0);                                                                                }        foreach ($writefds as $wfd)        {            $i = (int)$wfd;            $w = socket_write($wfd, "hello");        }    }   }function close($i){    global $connections, $input, $close;    socket_shutdown($connections[$i]);    socket_close($connections[$i]);    unset($connections[$i]);    unset($input[$i]);       unset($close[$i]);}?><div class="clear">
                 
              
              
        
            </div>