PHP的socket扩展

<?php

class SocketService
{
    private $address;
    private $port;
    private $_sockets;
  public $clients;
  public $maxid=1000;
  public $groups;
  public $groupClients;
    public function __construct($address = '', $port='')
{
            if(!empty($address)){
                $this->address = $address;
            }
            if(!empty($port)) {
                $this->port = $port;
            }
    }
  public function bindUid($cliend_id,$uid){
    $this->uids[$uid][$cliend_id]=$cliend_id;
  }
  public function sendToUid($uid,$msg){
    //
    $clients=$this->getClientsByUid($uid);
    
  }
  public function addGroup($groupid,$name){
    
  }
  public function joinGroup($cliend_id,$groupid){
    $this->groupClients[$groupid][$cliend_id]=$cliend_id;
  }
  public function sendGroup($groupid,$msg){
    if(!isset($this->groupClients[$groupid])){
      return false;
    }    
    $cids=$this->groupClients[$groupid];
    if(!empty($cids)){
      foreach($cids as $cid){
        if(isset($this->$clients[$cids])){
          $this->send($this->$clients[$cids],$msg);
        }else{
          unset($this->groupClients[$groupid]);
        }
        
      }
    }    
    
  }
  public function sendAll($msg){
    foreach($this->clients as $kk=>$cc){
      if($kk>0){
        $this->send($cc, $msg);
      }                
    }
  }
  public function onConnect($client_id){
    echo  "Client client_id:{$client_id}   \n";
         
  }
  
  public function onMessage($client_id,$msg){
    //发给所有的
    $this->sendAll($msg);  
  }
  
  public function onClose($client_id){
    echo "$client_id close \n";
  }
  
    public function service(){
        //获取tcp协议号码。
        $tcp = getprotobyname("tcp");
        $sock = socket_create(AF_INET, SOCK_STREAM, $tcp);
        socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1);
        if($sock < 0)
        {
            throw new Exception("failed to create socket: ".socket_strerror($sock)."\n");
        }
        socket_bind($sock, $this->address, $this->port);
        socket_listen($sock);
        echo "listen on $this->address $this->port ... \n";
        $this->_sockets = $sock;
    }
 
    public function run(){
        $this->service();
        $this->clients[] = $this->_sockets;
        while (true){
            $changes = $this->clients;
            $write = NULL;
            $except = NULL;
            socket_select($changes,  $write,  $except, NULL);
            foreach ($changes as $key => $_sock){
                if($this->_sockets == $_sock){ //判断是不是新接入的socket
                    if(($newClient = socket_accept($_sock))  === false){
            unset($this->clients[$key]);
            continue;
                    }
                    $line = trim(socket_read($newClient, 1024));
          echo strlen($line)."\n";
                    $this->handshaking($newClient, $line);
          $this->maxid++;
                    $this->clients[$this->maxid] = $newClient;
                    $this->onConnect($this->maxid);
                } else {
          $ret=@socket_recv($_sock, $buffer,  2048, 0);
          echo strlen($buffer)."\n";
          if(strlen($buffer)<9){
              socket_shutdown ($_sock,2);
              unset($this->clients[$key]);
              $this->onClose($key);
              socket_clear_error();
          }else{
            $msg = $this->decode($buffer);
            $this->onMessage($key,$msg);
          }
                    
                }
            }
        }
    }
 
    /**
     * 握手处理
     * @param $newClient socket
     * @return int  接收到的信息
     */
    public function handshaking($newClient, $line){
 
        $headers = array();
        $lines = preg_split("/\r\n/", $line);
        foreach($lines as $line)
        {
            $line = chop($line);
            if(preg_match('/\A(\S+): (.*)\z/', $line, $matches))
            {
                $headers[$matches[1]] = $matches[2];
            }
        }
        $secKey = $headers['Sec-WebSocket-Key'];
        $secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
        $upgrade  = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
            "Upgrade: websocket\r\n" .
            "Connection: Upgrade\r\n" .
            "WebSocket-Origin: $this->address\r\n" .
            "WebSocket-Location: ws://$this->address:$this->port/websocket/websocket\r\n".
            "Sec-WebSocket-Accept:$secAccept\r\n\r\n";
        return socket_write($newClient, $upgrade, strlen($upgrade));
    }
  
  
  
  
  /**
     * 发送数据
     * @param $newClinet 新接入的socket
     * @param $msg   要发送的数据
     * @return int|string
     */
    public function send($newClinet, $msg){
        $msg = $this->encode($msg);
        if(false==@socket_write($newClinet, $msg, strlen($msg))){
      socket_shutdown ($newClinet,2);  
    }
    }
    /**
     * 解析接收数据
     * @param $buffer
     * @return null|string
     */
    public function decode($buffer){
        $len = $masks = $data = $decoded = null;
        $len = ord($buffer[1]) & 127;
        if ($len === 126)  {
            $masks = substr($buffer, 4, 4);
            $data = substr($buffer, 8);
        } else if ($len === 127)  {
            $masks = substr($buffer, 10, 4);
            $data = substr($buffer, 14);
        } else  {
            $masks = substr($buffer, 2, 4);
            $data = substr($buffer, 6);
        }
        for ($index = 0; $index < strlen($data); $index++) {
            $decoded .= $data[$index] ^ $masks[$index % 4];
        }
        return $decoded;
    }
 
    
  /**
  *打包数据
  **/
    public function encode($buffer) {
    $first_byte="\x81";
    $len=strlen($buffer);
    if ($len <= 125) {
            $encode_buffer = $first_byte . chr($len) . $buffer;
        } else {
            if ($len <= 65535) {
                $encode_buffer = $first_byte . chr(126) . pack("n", $len) . $buffer;
            } else {
                $encode_buffer = $first_byte . chr(127) . pack("xxxxN", $len) . $buffer;
            }
        }
    return $encode_buffer;
    }
 
    /**
     * 关闭socket
     */
    public function close(){
        return socket_close($this->_sockets);
    }
}
 
$sock = new SocketService('127.0.0.1','8000');
$sock->run();