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

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<?php error_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]);
}
?>

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