Wordpress User Agent Class
<!DOCTYPE html>
<html class="class="<?php wpkit_user_agent_class(); ?>">
<head></head>
<body></body>
</html>
<?php
function wpkit_user_agent_class() {
global $is_lynx, $is_gecko, $is_IE, $is_winIE, $is_opera, $is_NS4, $is_safari, $is_chrome, $is_edge, $is_iphone;
$opera = strpos( $_SERVER['HTTP_USER_AGENT'], 'OPR');
$operaneon = strpos( $_SERVER['HTTP_USER_AGENT'], 'MMS');
$useragent = $_SERVER['HTTP_USER_AGENT'];
if( $is_lynx ) : echo ' linux';
elseif( $is_gecko ) : echo 'firefox';
elseif( $is_winIE ) : echo 'iexplorer';
elseif( $is_opera ) : echo 'opera';
elseif( $is_NS4 ) : echo 'ns4';
elseif( $is_safari ) : echo 'safari';
// No opera u opera neon
elseif( $is_chrome && strpos( $useragent, 'WOW64') == false ) : echo 'chrome';
elseif( $is_chrome && strpos( $useragent, $opera) == true ) : echo 'opera';
elseif( $is_chrome && strpos( $useragent, $operaneon) == true ) : echo 'operaneon';
elseif( $is_edge ) : echo ' edge ';
else : echo ' unknown_browser ';
endif;
if($is_iphone) : echo ' iphone '; endif;
if ( stristr( $_SERVER['HTTP_USER_AGENT'],"mac") ) : echo ' osx';
elseif ( stristr( $_SERVER['HTTP_USER_AGENT'],"linux") ) : echo ' linux';
elseif ( stristr( $_SERVER['HTTP_USER_AGENT'],"windows") ) : echo ' windows';
endif;
}