'/MSIE\s(?P<v>\d+)/i', @$_SERVER['HTTP_USER_AGENT'], $B) && $B['v'] <= 11 code example
Example: '/MSIE\s(?P\d+)/i', @$_SERVER['HTTP_USER_AGENT'], $B) && $B['v'] <= 11
if (preg_match('/MSIE\s(?P<v>\d+)/i', @$_SERVER['HTTP_USER_AGENT'], $B) && $B['v'] <= 8) {
// Browsers IE 8 and below
} else {
// All other browsers
}