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- add_filter('body_class','add_category_to_single');
- function add_category_to_single($classes) {
- 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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