Protocol.php

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<?php
abstract class Zend_TimeSync_Protocol
{
    protected $_socket;

    protected $_exceptions;

    protected $_timeserver;

    protected $_info = array();

    abstract protected function _prepare();

    abstract protected function _read();

    abstract protected function _write($data);

    abstract protected function _extract($data);

    protected function _connect()
    {
        $socket = @fsockopen($this->_timeserver, $this->_port, $errno, $errstr,
                             Zend_TimeSync::$options['timeout']);
        if ($socket === false) {
            throw new Zend_TimeSync_Exception('could not connect to ' .
                "'$this->_timeserver' on port '$this->_port', reason: '$errstr'");
        }

        $this->_socket = $socket;
    }

    protected function _disconnect()
    {
        @fclose($this->_socket);
        $this->_socket = null;
    }

    public function getInfo()
    {
        if (empty($this->_info) === true) {
            $this->_write($this->_prepare());
            $timestamp = $this->_extract($this->_read());
        }

        return $this->_info;
    }

    public function getDate($locale = null)
    {
        $this->_write($this->_prepare());
        $timestamp = $this->_extract($this->_read());

        $date = new Zend_Date($this, null, $locale);
        return $date;
    }
}