php 实现与 erlang 网络通讯

-module(server).
-export([start/0]).

-define( UINT, 32/unsigned-little-integer).
-define( INT, 32/signed-little-integer).
-define( USHORT, 16/unsigned-little-integer).
-define( SHORT, 16/signed-little-integer).
-define( UBYTE, 8/unsigned-little-integer).
-define( BYTE, 8/signed-little-integer).

-define( PORT, 5678).

%% 启动服务并接受客户端的连接
start() ->
  {ok, LSock} = gen_tcp:listen(?PORT, [binary, {packet, 0},{active, false}]),
  io:format("socket listen: ~p on ~p ~n",[LSock, ?PORT]),
  accept(LSock).

accept(LSock) ->
  {ok, ASock} = gen_tcp:accept(LSock),
  spawn(fun() -> server_loop(ASock) end),
  accept(LSock).

server_loop(ASock) ->
  case gen_tcp:recv(ASock, 0) of
    {ok, > = A} ->
      io:format("recv data: ~p ~p ~p~n", [Len, Cmd, Contain]),
      %%将接收到数据发送回客户端
      gen_tcp:send(ASock, A),
      server_loop(ASock);
    {ok, Data} ->
      io:format("recv unformated data: ~p~n", [Data]),
      server_loop(ASock);
    {error, _} ->
      {ok, recv_error}
    end.

<?php $timeout = 3;
//超时时间：3秒

$fp = fsockopen("tcp://127.0.0.1", 5678, $errno, $errstr, $timeout/* 连接超时时间 */);
if (!$fp) {
  echo "$errstr ($errno)<br />\n";
} else {
  stream_set_timeout($fp, $timeout);
  //远程数据接收或发送超时时间

  $format = "vva4";
  $data = pack($format, 4, 10001, "abcd");
  //$data 按照一定格式被打包成二进制数据

  fwrite($fp, $data);

  if (!feof($fp)) {

    $rs = fread($fp, 1024);
    //读取远程数据
    if ($rs) {

      $len = strlen($rs);
      //$len 可以获取数据的长度，用以计算content的长度
      //在这个例子中，content 的长度为 4

      $format = "vlen/vcmd/a4content";
      $data = unpack($format, $rs);

      print_r($data);
    } else {
      echo "timeout!";
    }
  } else {
    echo "timeout!";
  }
  fclose($fp);
}
?>

Array ( [len] => 4 [cmd] => 10001 [content] => abcd )