WordPress | Add browser class as body class

September 18th, 2018

Sometimes, working with wordpress, you need to adjust styles in relation with the browser that user are using.
This can be little bit difficult, ( especially now that we don’t longer have explorer and edge browser media queries ).
So we can add an “filter” in our theme’s function.php, that add a class, that identify user’s browser and operetion system, to body.

Here the snippet for do that, add directly on your theme’s funcion.php.

<?php 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'); ?>

And here an example of how the code looks after adding the action viewed before:

That’s All