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<?php defined('SYSPATH') or die('No direct script access.');
/*
* This file is part of open source system FreenetIS
* and it is released under GPLv3 licence.
*
* More info about licence can be found:
* http://www.gnu.org/licenses/gpl-3.0.html
*
* More info about project can be found:
* http://www.freenetis.org/
*
*/

/**
* Server helper class.
*
* $Id: server.php
*
* @package Helper
* @author Sevcik Roman
* @see http://my.opera.com/Knedle/blog/show.dml/451690
*/
class server
{
public static function http_user_agent()
{
return $_SERVER['HTTP_USER_AGENT'];
}

public static function http_host()
{
return $_SERVER['HTTP_HOST'];
}

public static function server_name()
{
return $_SERVER['SERVER_NAME'];
}

public static function server_addr()
{
return $_SERVER['SERVER_ADDR'];
}

public static function server_port()
{
return $_SERVER['SERVER_PORT'];
}

public static function remote_addr()
{
return $_SERVER['REMOTE_ADDR'];
}

public static function http_referer()
{
return (isset($_SERVER['HTTP_REFERER'])) ? $_SERVER['HTTP_REFERER'] : '';
}

public static function http_accept_language()
{
if (array_key_exists('HTTP_ACCEPT_LANGUAGE', $_SERVER))
{
return $_SERVER['HTTP_ACCEPT_LANGUAGE'];
}
return FALSE;
}

/**
* Returns server software
*
* @author Michal Kliment
* @return string
*/
public static function server_software()
{
return $_SERVER['SERVER_SOFTWARE'];
}

/**
* Returns name of script.
*
* @author Michal Kliment
* @return string
*/
public static function script_name()
{
return $_SERVER['SCRIPT_NAME'];
}

/**
* Tests if http server is apache
*
* @author Michal Kliment
* @return boolean
*/
public static function is_apache()
{
if (strpos(strtolower(server::server_software()), 'apache') === false)
return false;
else
return true;
}

/**
* Tests if mod_rewrite is enabled
*
* @author Michal Kliment
* @return boolen
*/
public static function is_mod_rewrite_enabled()
{
// server is not apache - other haven't support for mod_rewrite
if (!server::is_apache())
return false;

// mod_rewrite is
return in_array('mod_rewrite', apache_get_modules());
}

/**
* Return request uri
*
* @author Michal Kliment
* @return string
*/
public static function request_uri()
{
return $_SERVER['REQUEST_URI'];
}

/**
* Returns query string of current url with ? if not empty
*
* @author Michal Kliment
* @return string
*/
public static function query_string()
{
return (empty($_SERVER['QUERY_STRING']) ? '' : '?' . $_SERVER['QUERY_STRING']);
}
/**
* Returns base directory of FreenetIS
*
* This function is based on current path of this file, please do not
* relocate this file!!
*
* @author Ondřej Fibich
* @return string
*/
public static function base_dir()
{
return dirname(dirname(dirname(__FILE__)));
}
}

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