WP 4.7 in_category change?

I’ve found the issue. I’ve been running a filter on list_terms_exclusions specifically to remove all children of “Uncategorized” from appearing on the public website. 

add_filter('list_terms_exclusions', 'my_list_terms_exclusions',10,2);

However, using in_category() still returned matches on those categories, which was exactly what I wanted. I needed to hide those categories from appearing in category listings, but I still needed to know when a specific post had one or more of those categories present. And so I was able to use in_category() for that purpose.

This technique has worked fine for as long as I remember until 4.7

However, as of 4.7 (and possibly before), the in_category() function gets filtered by list_terms_exclusions. So it no longer returns any of my categories under Uncategorized.

Related Posts:

  1. Is There a Difference Between Taxonomies and Categories?
  2. Check if a post is in any child category of a parent category
  3. How to export and import taxonomies (category, tag and/or custom taxonomy) and their terms
  4. Control term order on a per-post basis
  5. How can I add the featured image functionality to a custom taxonomy?
  6. Share one taxonomy across multiple blogs in 3.0 [duplicate]
  7. Can a Child Category Have More than One Parent?
  8. wp_update_nav_menu_item() to insert categories
  9. Admin Panel – Disable Moving Selected Terms To Top of Metabox
  10. How to make custom taxonomy check boxes like ‘Categories’
  11. Create terms when registering taxonomy?
  12. How to create non-unique sub-category slugs?
  13. How to get next previous category in same taxonomy?
  14. Display only deepest category on a single post?
  15. How to add HTML5 ‘required’ attribute to wp_dropdown_categories() without JavaScripts?
  16. Wrap a chosen category name with div
  17. Does WordPress Offer a Way to Find All of the Categories that Don’t Have Children?
  18. Add custom taxonomy terms to WordPress menu dynamically & append #slug to url
  19. wp_list_categories, Add class to all list items with children
  20. Getting WordPress custom taxonomy/category?
  21. Display empty taxonomy terms with get_terms()
  22. Return category slug / title from category ID
  23. Connecting WordPress gallery to custom categories (taxonomy)
  24. Get term by slug in Gutenberg
  25. How to query posts from specific authors and categories using WP_query?
  26. How to get the depth of a category’s subcategories
  27. New categories are now going to 404s
  28. Add custom taxonomy under the category title
  29. Best way to programmatically link to multiple categories (union/intersection) [closed]
  30. “Reversable” and “Re-useable” Subcategories (or other taxonomic structure)
  31. Get multidimensional array that reflects category hierarchy
  32. List Terms in Category
  33. How to get category URL with the slug?
  34. Can I use get_adjacent_post for specific categories?
  35. Taxonomy filter all children
  36. Display Slug instead of Name
  37. Force a user’s posts category
  38. Search Posts / Pages with multiple options?
  39. ACF: Display category name using taxonomy field
  40. How to filter out Categories for specific post types on WordPress Admin?
  41. Taxonomy name repeating when showing 2 posts from each category
  42. New Categories Not Shown In the Post Edit Page
  43. Shortcodes not working in category or tag description
  44. Filtering multiple categories via the URL
  45. Display specific categories by ID
  46. Display Posts Loop for each parent and for each Child
  47. How to “group” (categorize) the Pages together?
  48. Is There a Difference Between Taxonomies and Categories?
  49. How can I edit the ‘Most Used’ tab in the categories meta-box to show another custom taxonomy?
  50. Why don’t posts show up in my categories on the frontend?
  51. Flat category URLs but retaining hierarchy?
  52. How many categories can WordPress handle before performance suffers?
  53. Custom taxonomy template for categories
  54. Targeting Parent Category Pages
  55. Wacky taxonomy in wordpress
  56. Include WooCommerce product to all child categories
  57. Question on using custom structures for categories
  58. Notice: Trying to get property of non-object in : custom fields category
  59. How to modify the output of wp_terms_checklist when used within the built-in category metabox on edit posts?
  60. WP REST API not retrieving all categories
  61. Some categories missing on wp-admin/edit-tags.php?taxonomy=category
  62. List just subcategory and products of active category page in Woocommerce
  63. Eliminate word from $term->name
  64. What Must to Display the “mysite.com/category” URL?
  65. Style a category from category list
  66. Same menu for different taxonomies to reach different content
  67. How to schedule categories?
  68. Copy post taxonomy?
  69. Natural sort / ordering wp_dropdown_categories
  70. How to get posts using category slug in ClassiPress?
  71. Best way to categorize/populate a magazine style layout
  72. Combining these queries? (Same taxonomy term + same category as post)
  73. get_the_category – display only a single category for a post (not all categories)
  74. display category with background color
  75. Disable Category Taxonomy
  76. Automatically adding tags and categories into Post Excerpt for searching
  77. How can i add service category here? [duplicate]
  78. How to set acf color field as background color to product category
  79. How to target all woocommerce categories that don’t have any subcategories in them?
  80. Filtering posts in category by tag URL
  81. Parent Category and Subcategory default text generated with category
  82. get taxonomy list in a page in the wordpress
  83. Number of categories slowing down the site
  84. Image Upload Custom Form Field for Category and Custom Taxonomy
  85. Renaming default category taxonomy?
  86. How get all media from a posts category by db?
  87. How to echo Tags and Categories as plain text
  88. How can I add HTML classes for current taxonomy/term hierarchy into my pages to simplify styles?
  89. Display List of Categories Within a Custom Taxonomy
  90. How to add a post with new Taxonomy without assigning to default category?
  91. Grouping parent categories into sections
  92. get_adjacent_post_link excluded_terms ignored
  93. Taxonomy for custom post type not found
  94. Category base 404 – fix
  95. Why is my post categories not displaying?
  96. Assign a category by user and customize the edit-tags.php?taxonomy=category page
  97. Show parent-child relationship for categories in the wordpress admin
  98. Woocommerce custom taxonomy order
  99. Hook action when create new category [duplicate]
  100. Images as Categories