Add Category to the Body Class in WordPress

19 Oct 2016

WordPress doesn’t include the category in the body classes by default, so stick this in your functions.php and hey presto, the category will be added for each post with a category assigned to it.

function add_category_to_single($classes, $class) {
  if (is_single() ) {
    global $post;
    foreach((get_the_category($post->ID)) as $category) {
      // add category slug to the $classes array
      $classes[] = $category->category_nicename;
  // return the $classes array
  return $classes;



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