Clearfix and HR shortcodes for WordPress

function shortcode_hr() {
 return '<hr>';
}
function shortcode_clearfix() {
 return '<div style="display: block; visibility: hidden; clear: both; height: 0;"></div>';
}
function register_shortcodes() {
 add_shortcode('hr', 'shortcode_hr');
 add_shortcode('clearfix', 'shortcode_clearfix');
}
add_action( 'init', 'register_shortcodes');