aqui va la que yo uso :
Código PHP:
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
*/
$b['is_major'] = intval(substr($ua, strpos($ua, 'Mozilla/') + 8));
$b['is_minor'] = substr($ua, strpos($ua, 'Mozilla/') + 8);
$b['is_minor'] = (int)substr($b['is_minor'], strpos($b['is_minor'], '.') + 1);;
/**
* Type of browser
*/
$b['is_safari'] = strpos($ua, ' Safari/') !== false;
$b['is_chrome'] = strpos($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 && strpos($ua, 'Trident') === false); // IE7
$b['is_ie7_compat'] = (strpos($ua, 'MSIE 7.') !== false && strpos($ua, 'Trident') === true); // IE8 in IE7 compatibility mode
$b['is_ie8'] = strpos($ua, 'MSIE 8.') !== false; // IE8
// 64bit Windows
$b['is_x64'] = strpos($ua, 'x64') !== 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 AND strpos($ua, 'Firefox/3.5') === false);
$b['is_ff35'] = strpos($ua, 'Firefox/3.5') !== 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 AND strpos($ua, 'Version/10') === false);
$b['is_opera9.5'] = (strpos($ua, 'Opera/9.5') !== false AND strpos($ua, 'Version/10') === false);
$b['is_opera10'] = strpos($ua, 'Version/10') !== false;
/**
* Chrome
*/
} elseif ($b['is_chrome']) {
$b['is_chrome2'] = strpos($ua, 'Chrome/2') !== false;
$b['is_chrome1'] = strpos($ua, 'Chrome/1') !== false; // Untested
/**
* 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;
$b['is_win7'] = strpos($ua, 'Windows NT 6.1') !== 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;
}
function esIE(){
$browser = $this->_GetUserAgent();
return $browser['is_ie'];
}
