Using the body_class filter // Use the filter ‘body_class’ add_filter( ‘body_class’, ‘parent_id_body_class’ ); function parent_id_body_class( $classes ) { // add parent id number to the $classes array $classes[] = wp_get_post_parent_id( $post_ID ); // return the $classes array return $classes; } Anyway, I recommend you to add some text to the id number, in order to … Read more
Remove body class per page template
add_filter ‘body_class’ only working for logged in users
You can try this, $body_css_classes = get_body_class(); if ( in_array( ‘my-class’, $body_css_classes ) ) { /* DO THIS */ } else { /* DO THAT */ } For more details please check this.
Note that you must always return the classes in your callback. So move this part: return $classes; out of the if condition. The is_page() does support multiple ID’s when it’s in an array. This should work: add_filter( ‘body_class’, ‘custom_body_class’ ); function custom_body_class( $classes ) { if ( is_page( [ 38034, 10883, 12031 ] ) ) … Read more
body_class not working anymore?