apply_filters( 'get_the_categories', WP_Term[] $categories, int|false $post_id )

使用示例

• 示例1

  从特定文章的循环中删除某些类别。

  假设我们要删除ID为5的文章的类别，类别slug是cat-slug-a和cat-slug-b

  /**
   * Remove certain categories on post loop for a specific post
   * @param array $categories Array of categories
   * @return array $categories filtred categories
   */
  function wpdocs_remove_selected_categories( $categories ) {
  	if ( 5 == get_the_ID() ) { // Check if it is a specific post.
  		
  		$categories_to_remove = array(
  			'cat-slug-a',
  			'cat-slug-b'
  		); // Array of categories slug to be remove.
  
  		foreach ( $categories as $index => $single_cat ) {
  
  			if ( in_array( $single_cat->slug, $categories_to_remove ) ) {
  				unset( $categories[ $index ] ); // Remove the category.
  			}
  		}
  	}
  	
  	return $categories;
  }
  add_filter( 'get_the_categories', 'wpdocs_remove_selected_categories' );