C:/xampp/htdocs/moodle/lib/zend/Zend/Service/DeveloperGarden/IpLocation/IpAddress.php

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<?php
require_once 'Zend/Validate/Ip.php';

class Zend_Service_DeveloperGarden_IpLocation_IpAddress
{
    private $_version = 4;

    private $_versionSupported = array(
        4,
        //6, not supported yet
    );

    private $_address = null;

    public function __construct($ip, $version = 4)
    {
        $this->setIp($ip)
             ->setVersion($version);
    }

    public function setIp($ip)
    {
        $validator = new Zend_Validate_Ip();

        if (!$validator->isValid($ip)) {
            $message = $validator->getMessages();
            require_once 'Zend/Service/DeveloperGarden/Exception.php';
            throw new Zend_Service_DeveloperGarden_Exception($message['notIpAddress']);
        }
        $this->_address = $ip;
        return $this;
    }

    public function getIp()
    {
        return $this->_address;
    }

    public function setVersion($version)
    {
        if (!in_array($version, $this->_versionSupported)) {
            require_once 'Zend/Service/DeveloperGarden/Exception.php';
            throw new Zend_Service_DeveloperGarden_Exception('Ip Version ' . (int)$version . ' is not supported.');
        }

        $this->_version = $version;
        return $this;
    }

    public function getVersion()
    {
        return $this->_version;
    }
}