Ticket #37114: 37114.2.diff

src/wp-includes/post-template.php

@@ -526 +526 @@
         // hentry for hAtom compliance
         $classes[] = 'hentry';
 
-        // All public taxonomies
+        // All public taxonomies.
         $taxonomies = get_taxonomies( array( 'public' => true ) );
+
+        /**
+         * Filters the taxonomies to generate classes for each individual term.
+         *
+         * Default is all public taxonomies registered to the post type.
+         *
+         * @since 4.9.9
+         *
+         * @param array   $taxonomies List of all public taxonomies to generate classes for.
+         * @param array   $classes    An array of post class names.
+         * @param array   $class      An array of additional class names added to the post.
+         * @param int     $post_id    The post ID.
+         */
+        $taxonomies = apply_filters( 'post_class_taxonomies', $taxonomies, $classes, $class, $post->ID );
+
         foreach ( (array) $taxonomies as $taxonomy ) {
                 if ( is_object_in_taxonomy( $post->post_type, $taxonomy ) ) {
                         foreach ( (array) get_the_terms( $post->ID, $taxonomy ) as $term ) {