<?php
    
/**
    * o------------------------------------------------------------------------------o
    * | This package is licensed under the Phpguru license 2008. A quick summary is  |
    * | that the code is free to use for non-commercial purposes. For commercial     |
    * | purposes of any kind there is a small license fee to pay. You can read more  |
    * | at:                                                                          |
    * |                  http://www.phpguru.org/static/license.html                  |
    * o------------------------------------------------------------------------------o
    *
    * © Copyright 2008 Richard Heyes
    */

    /**
    * UserAgent detection. Based on the js ultimate browser detection thingy.
    * Email richardh@phpguru.org to send suggestions or improvements.
    *
    * Advantages:
    *
    * o Its quick
    * o It doesn't pollute the global namespace
    *
    * One example usage is to only output a simple version of your website
    * if it's a bot. Why waste your bandwidth? Its still advisable to output some
    * sort of site, otherwise things like news aggregators won't work.
    */

    
function GetUserAgent($ua null)
    {
        
/**
        * Default to the user agent that the browser sends
        */
        
if (is_null($ua)) {
            
$ua $_SERVER['HTTP_USER_AGENT'];
        }
        
        
$b = array();

        
/**
        * Major and minor version numbers
        */
        
$b['is_major'] = intval(substr($uastrpos($ua'Mozilla/') + 8));
        
$b['is_minor'] = substr($uastrpos($ua'Mozilla/') + 8);
        
$b['is_minor'] = (int)substr($b['is_minor'], strpos($b['is_minor'], '.') + 1);;

        
/**
        * Type of browser
        */
        
$b['is_chrome'] = strpos($ua' Chrome/') !== false;
        
$b['is_ff']     = strpos($ua'Firefox') !== false;
        
$b['is_ie']     = (strpos($ua'MSIE')     !== false && strpos($ua'Opera') === false);
        
$b['is_opera']  = strpos($ua'Opera')     !== false;
        
$b['is_nn']     = (strpos($ua'Mozilla')  !== false && 
                          
strpos(strtolower($ua), 'spoofer')  === false &&
                          
strpos(strtolower($ua), 'webtv')   === false && 
                          
strpos(strtolower($ua), 'hotjava') === false &&
                          
$b['is_opera'] === false &&
                          
$b['is_ie']    === false &&
                          
$b['is_ff']    === false &&
                          
$b['is_chrome'] === false);
        
$b['is_konq']  = strpos($ua'Konqueror') !== false;

        
/**
        * Operating system
        */
        
$b['is_win'] = strpos($ua'Win') !== false;
        
$b['is_mac'] = strpos($ua'Mac') !== false;
        
$b['is_nix'] = strpos($ua'X11') !== false;

        
/**
        * Internet Ekplorer
        */
        
if ($b['is_ie'] AND !$b['is_opera']) {
            
$b['is_ie4']   = strpos($ua'MSIE 4.') !== false;
            
$b['is_ie5']   = strpos($ua'MSIE 5.') !== false;
            
$b['is_ie5_5'] = strpos($ua'MSIE 5.5') !== false;
            
$b['is_ie6']   = strpos($ua'MSIE 6.') !== false;
            
$b['is_ie7']   = strpos($ua'MSIE 7.') !== false;
            
$b['is_ie8']   = strpos($ua'MSIE 8.') !== false;

        
/**
        * Firefox
        */
        
} elseif ($b['is_ff']) {
            
$b['is_ff1'] = strpos($ua'Firefox/1') !== false;
            
$b['is_ff2'] = strpos($ua'Firefox/2') !== false;
            
$b['is_ff3'] = strpos($ua'Firefox/3') !== false;

        
/**
        * Netscape Navigator
        */
        
} elseif ($b['is_nn']) {
            
$b['is_nn2']   = $b['is_major'] === 2;
            
$b['is_nn2up'] = $b['is_major'] >= 2;
            
$b['is_nn3']   = $b['is_nn2up'] && $b['is_major'] === 3;
            
$b['is_nn3up'] = $b['is_nn2up'] && $b['is_major'] >= 3;
            
$b['is_nn4']   = $b['is_nn3up'] && $b['is_major'] === 4;
            
$b['is_nn4up'] = $b['is_nn3up'] && $b['is_major'] >= 4;
            
$b['is_nn6']   = $b['is_nn4up'] && $b['is_major'] === 5;
            
$b['is_nn6up'] = $b['is_nn4up'] && $b['is_major'] >= 5;
            
$b['is_nn8']   = $b['is_nn6up'] && (bool)strpos($ua'Netscape/8');

        
/**
        * Opera
        */
        
} elseif ($b['is_opera']) {
            
$b['is_opera5'] = strpos($ua'Opera/5') !== false;
            
$b['is_opera6'] = strpos($ua'Opera/6') !== false;
            
$b['is_opera7'] = strpos($ua'Opera/7') !== false;
            
$b['is_opera8'] = strpos($ua'Opera/8') !== false;
            
$b['is_opera9'] = strpos($ua'Opera/9') !== false;
            
$b['is_opera9.5'] = strpos($ua'Opera/9.5') !== false;
        
        
/**
        * Other. Some of the more common robots etc...
        */
        
} else {
            
$b['is_google']    = strpos($ua'Mediapartners-Google') !== false;
            
$b['is_googletb']  = strpos($ua'GoogleToolbar') !== false;
            
$b['is_ffg']       = strpos($ua'Feedfetcher-Google') !== false;
            
$b['is_googlebot'] = strpos($ua'Googlebot') !== false;
            
            
$b['is_newsgator'] = strpos($ua'NewsGatorOnline/') !== false;
            
$b['is_magpierss'] = strpos($ua'MagpieRSS') !== false;
            
$b['is_planetphp'] = strpos($ua'PlanetPHPAggregator') !== false;
            
$b['is_bloglines'] = strpos($ua'Bloglines') !== false;
            
$b['is_doubanbot'] = strpos($ua'Doubanbot') !== false;
            
$b['is_topix']     = strpos($ua'Topix.net') !== false;
            
$b['is_rssreader'] = strpos($ua'RssReader') !== false;
            
$b['is_nnw']       = strpos($ua'NetNewsWire') !== false;
            
$b['is_ngo']       = strpos($ua'NewsGatorOnline') !== false;
            
$b['is_gn']        = strpos($ua'GreatNews') !== false;
            
$b['is_rb']        = strpos($ua'RssBar') !== false;
        }
        
        
/**
        * Which version of windows?
        */
        
if ($b['is_win']) {
            
$b['is_98']      = strpos($ua'Windows 98')     !== false;
            
$b['is_nt']      = strpos($ua'Windows NT 4.0') !== false;
            
$b['is_2000']    = strpos($ua'Windows NT 5.0') !== false;
            
$b['is_xp']      = strpos($ua'Windows NT 5.1') !== false;
            
$b['is_2003']    = strpos($ua'Windows NT 5.2') !== false;
            
$b['is_vista']   = strpos($ua'Windows NT 6.0') !== false;

        
/**
        * Macs
        */
        
} elseif ($b['is_mac']) {
            
$b['is_osx'] = strpos($ua'OS X') !== false;

        
/**
        * *Nix
        */
        
} elseif ($b['is_nix']) {
            
$b['is_fed']    = strpos($ua'Fedora/') !== false;
            
$b['is_ubuntu'] = strpos($ua'Ubuntu') !== false;
        }
        
        return 
$b;
    }
?>