学步园

function MyFunc($userid, $guid)
{
 //固定包头
 //包ID = (1053)D = (041D)H
 //加密码 = 0
 //包Len = 8
 $packetHead = "\x1D\x04\x00\x08\x00\x00\x00";
 Print($userid);
 Print($guid);
 
 //构造包体
 //UserID
 $param1 = getNetByteStream($userid);
 //Guid
 $param2 = getNetByteStream($guid);
 $packetBody = $param1.$param2;
 
 $address = "192.168.0.108";
 $service_port = 9005;
 $content = $packetHead.$packetBody;
 
 if(($socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP))< 0)
   echo "socket_create() failed: reason: " . socket_strerror($socket) . "\n";
   //echo "Attempting to connect to '$address' on port '$service_port'...";
   if (($result = socket_connect($socket, $address, $service_port))< 0)  
   echo "socket_connect() failed.\nReason: ($result) " . socket_strerror($result) . "\n";
   $res = socket_write($socket, $content, 15);
   socket_close($socket);
}

//得到用于传输的网络字节流
function getNetByteStream($n) {
 
 $array = array(0,0,0,0,0,0,0,0);
 $i = 0;
 
 //先转成16进制
 $temp = $n;
 while ($temp != 0) {
  $i++;
  $array[8-$i] = $temp%16 ;
  $temp = floor($temp/16);
 }
 
 //字节倒序
 for ($i = 0; $i < 4; $i+=2) {
   $t1 = $array[$i];
   $t2 = $array[$i+1];
     $array[$i] = $array[6-$i];
     $array[$i+1] = $array[7-$i];
     $array[6-$i] = $t1;
     $array[7-$i] = $t2;
 }
 
 //再转换回来，生成字节流
 $strRet = "";
 for ($i = 0; $i < 8; $i += 2) {
     $xxx = $array[$i]*16 + $array[$i+1];
     $strRet = $strRet.chr($xxx);
 }
 
 return $strRet;
 
 }

假设要生成的struct 结构是这样子的，
struct TEST{
char name[10];
char pass[33];
int age;
unsigned char flag;
};
在php中我用类模拟这个结构体
[php]
class struct{
var $name;
var $pass;
var $age;
var $flag;
function __construct($name,$pass,$age,$flag){
$this->name=$name;
$this->pass=$pass;
$this->age=$age;
$this->flag=$flag;
pack("a10",$this->name);
pack("a33",$this->pass);
pack("i*",$this->age);
pack("C*",$this->flag);
settype($this->name,'string');
settype($this->pass,'string');
settype($this->flag,'int');
settype($this->flag,'string');
}
}
$st=new struct();
$st->name="Test";
$st->pass="Test";
$st->age="5";
$st->flag="1";
print_r($st);
[/php]

1. $msg = pack("a10",$this->name);
2. $msg .= pack("a33",$this->pass);
3. $msg .= pack("i*",$this->age);
4. $msg .= pack("C*",$this->flag);
5. 就是把数据转成二进制,序列,$msg作为包通过socket,发给c++
7. 当然如果c++ 回给你的包里面有是结构的,二进制序列,你就得用unpack安之前的顺序来解包
9. 不管是c++还是php 发包,都要转成二进制序列, 这个序列的顺序,当然是双方沟通后的结构,也可以是单方定后,告诉另一方.
10. 和写文件一样, 不能一下把一个结构体写到文件里吧.一项一项的顺序还是自己定的