_options[$level][$optname]; } public function listen($backlog) { } public function recv($buf, $len, $flags) { } public function set_option($level, $optname, $optval) { if (!is_array($this->_options[$level])) { $this->_options[$level] = Array(); } $this->_options[$level][$optname] = $optval; } public function write($buffer, $length = 0) { } }