protected function readBytes()
    {
        $size = $this->readInt();
        if ($size === -1) {
            return null;
        }
        if ($size === 0) {
            return '';
        }
        return $this->readRaw($size);
    }
protected function readBytes()
    {
        $size = $this->readInt();
        if ($size === -1) {
            return null;
        }
        if ($size === 0) {
            return '';
        }
        return $this->readRaw($size);
    }
protected function readBytes ( ) { $ size = $ this -> readInt ( ) ; if ( $ size === - 1 ) { return null ; } if ( $ size === 0 ) { return '' ; } return $ this -> readRaw ( $ size ) ; }
Read bytes stream from socket, including int length
@return string
Read bytes stream from socket including int length