php基于websocket搭建简易聊天室实践

4、进行握手 流程是接收websocket内容从Sec-WebSocket-Key:中获取key并通过加密算法写入缓冲区客户端会进行验证（自动验证不需要我们处理）

public function hands($client,$buff,$v)
    {
      //提取websocket传的key并进行加密 （这是固定的握手机制获取Sec-WebSocket-Key:里面的key）
      $buf = substr($buff,strpos($buff,'Sec-WebSocket-Key:')+18);
      //去除换行空格字符
      $key = trim(substr($buf,0,strpos($buf,"rn")));
       //固定的加密算法
      $new_key = base64_encode(sha1($key."258EAFA5-E914-47DA-95CA-C5AB0DC85B11",true));
      $new_message = "HTTP/1.1 101 Switching Protocolsrn";
      $new_message .= "Upgrade: websocketrn";
      $new_message .= "Sec-WebSocket-Version: 13rn";
      $new_message .= "Connection: Upgradern";
      $new_message .= "Sec-WebSocket-Accept: " . $new_key . "rnrn";
      //将套接字写入缓冲区
      socket_write($v,$new_message,strlen($new_message));
      // socket_write(socket,$upgrade.chr(0), strlen($upgrade.chr(0)));
      //标记此套接字握手成功
      $this->hand[(int)$client]=true;
    }

5、解析客户端的数据（我这里没有进行加密，如果有需要也可以自己加密 ）

//解析数据
    public function decodeData($buff)
    {
      //$buff 解析数据帧
      $mask = array(); 
      $data = ''; 
      $msg = unpack('H*',$buff); //用unpack函数从二进制将数据解码
      $head = substr($msg[1],0,2); 
      if (hexdec($head{1}) === 8) { 
        $data = false; 
      }else if (hexdec($head{1}) === 1){ 
        $mask[] = hexdec(substr($msg[1],4,2)); 
        $mask[] = hexdec(substr($msg[1],6,2)); 
        $mask[] = hexdec(substr($msg[1],8,2)); 
        $mask[] = hexdec(substr($msg[1],10,2)); 
          //遇到的问题 刚连接的时候就发送数据 显示 state connecting
        $s = 12; 
        $e = strlen($msg[1])-2; 
        $n = 0; 
        for ($i=$s; $i<= $e; $i+= 2) { 
          $data .= chr($mask[$n%4]^hexdec(substr($msg[1],$i,2))); 
          $n++; 
        }
        //发送数据到客户端
          //如果长度大于125 将数据分块
          $block=str_split($data,125);
          $mess=array(
            'mess'=>$block[0],
            );
        return $mess;          
      }

6、将套接字写入缓冲区

//发送数据
    public function send($mess,$v)
    {
      //遍历套接字数组 成功握手的 进行数据群发
      foreach ($this->socs as $keys => $values) {
        //用系统分配的套接字资源id作为用户昵称
          $mess['name']="Tourist's socket:{$v}";
          $str=json_encode($mess);
          $writes ="x81".chr(strlen($str)).$str;
          // ob_flush();
          // flush();
          // sleep(3);
          if($this->hand[(int)$values])
            socket_write($values,$writes,strlen($writes));
        }
    }

7、运行方法