Add Browser and OS to Body Class

June 26, 2015

For use with older browser version testing.

function mv_browser_body_class($classes) {
        global $is_lynx, $is_gecko, $is_IE, $is_opera, $is_NS4, $is_safari, $is_chrome, $is_iphone;
        if($is_lynx) $classes[] = 'lynx';
        elseif($is_gecko) $classes[] = 'gecko';
        elseif($is_opera) $classes[] = 'opera';
        elseif($is_NS4) $classes[] = 'ns4';
        elseif($is_safari) $classes[] = 'safari';
        elseif($is_chrome) $classes[] = 'chrome';
        elseif($is_IE) {
                $classes[] = 'ie';
                if(preg_match('/MSIE ([0-9]+)([a-zA-Z0-9.]+)/', $_SERVER['HTTP_USER_AGENT'], $browser_version))
                $classes[] = 'ie'.$browser_version[1];
        } else $classes[] = 'unknown';
        if($is_iphone) $classes[] = 'iphone';
        if ( stristr( $_SERVER['HTTP_USER_AGENT'],"mac") ) {
                 $classes[] = 'osx';
           } elseif ( stristr( $_SERVER['HTTP_USER_AGENT'],"linux") ) {
                 $classes[] = 'linux';
           } elseif ( stristr( $_SERVER['HTTP_USER_AGENT'],"windows") ) {
                 $classes[] = 'windows';
           }
        return $classes;
}
add_filter('body_class','mv_browser_body_class');

Trigger function by adding to body.

Sourced here.