Not sure it’s strictly the answer but I found a plug-in which still meant I needed to edit my functions.php file and was probably overkill for what I wanted but it resolved the issue and I binned the code above completely.
Related Posts:
- previous/next_post_link in the same sub-category?
- adding custom fields to next and previous post link
- WordPress previous_post_link exclude posts with multiple categories
- Can I use get_adjacent_post for specific categories?
- Exclude Posts From Specific Category from Next and Previous post links
- Show category from “Next post” and “Previous post” [edited]
- Previous/next post links displaying wrong category than is desired
- Link to the next/prev posts in index loop in same category?
- Single.php Category Post Count
- Get next post in same category not working WP 4.7.4
- Change next_post and previous_link to navigate throught parent categories only
- how to implement next/prev within category archive?
- Get the children of the parent category
- wp_nav_menu not appearing for a couple pages
- Main menu not appearing on category pages
- How can I limit the length of the previous/next posts in my WordPress Theme?
- Problem excluding category from get_next_post
- specify meta_key / meta_value condition for prev_post_link and next_post_link
- Is it possible to put next and previous category links?
- Post in Multiple Categories to stay in current category (permalink, next previous post link)
- next_post_link and previous_post_link in custom post type single page, in same non-custom category
- Previous/next link to post in category, NOT tag?
- connect last post with first post
- Multiple menu items highlighted
- wp_nav_menu not highlighting the current category when viewing a single post
- Open subcategories in submenu on click in primary menu
- How to display only posts assigned to a particular, isolated, subcategory
- Is it possible to nest get_previous_post()?
- Checkboxes in the category list?
- Get Prevous/Next Post Specific Category Without Excludes
- Restoring default article pagination on archives – Removing custom limits
- posts_nav_link(); picks up index.php instead of category.php as template
- get_adjacent_post – in same term or category not working
- Create menu / submenu from category subcategory and posts
- How to get Next/previous_post_link to go through articles in top parent category
- How to display numbered pages in a category
- next_post_link / previous_post_link not working with WP_Query
- Ambrosite Next/Previous Post Link Plus or WP next_post_link to cycle through top level category
- Give Children Unique ID’s
- Multiple categories for one menu item?
- Show next post in same category but start from the latest
- Can’t get the previous and next posts permalink
- Next/Previous links doesn’t work in the same category
- How do I display a greyed out next_post_link when there is no next post
- Global navigation in multisite: problem with categories
- Include “Scheduled” (“Future”) Posts in WordPress Post Navigation ( previous_post_link, next_post_link ) for a Specific Custom Post Type
- How to get next post link of child custom post type from parent post and get next post link of parent post from the last child post?
- display specific category when website loads
- How to exclude posts by meta key value in the_post_navigation next prev links?
- Prev/Next Navigation on Single Post Disappeared for Custom Post Type
- How to add all subcategories as submenu in WordPress menu
- Change URL of previous posts and next posts link in WordPress
- Dynamic next and previous post links
- Next and previous links category infinite loop
- omit categories from main navigation menu
- Loop within category’s posts
- Next/Prev category post in same button
- Grouping parent categories into sections
- A simple question regarding tags and categories
- get_adjacent_post_link excluded_terms ignored
- Transfering static site to wordpress and retaining category by month paginations
- Get all first images of posts in same category
- In category.php I need to get the next 10/previous 10 posts
- Previous / next posts using featured image thumbnail as links
- Is there a function to modify existing previous/next post link without modifying theme files?
- How to create an automatic MultiColoumn MegaMenu with Categories WordPress
- Is There a Difference Between Taxonomies and Categories?
- Can the Next/Prev Post links be ordered by menu order or by a meta key?
- List all subcategories from category
- How To Find Out WordPress Category Table in MYSQL?
- Add custom field to Category
- Get Category ID inside Category template
- Only one category per post
- WordPress Multisite – global categories
- Get posts from sites in Multisite?
- WP REST API: filter by category 1 AND category 2
- How To Get Parent Category Slug of Current Post
- Display All Products by Category with WooCommerce
- What is the difference between a “tag” and a “category”?
- Is there an easy way to make a meta box have the tabs like the Categories meta box has?
- How to check if I’m on the last page of posts?
- Display posts from the same category using next/previous post link
- How would I get a taxonomy/category list inside a Gutenberg block?
- Can I set a default featured image for a category?
- Check if a post is in any child category of a parent category
- How to export and import taxonomies (category, tag and/or custom taxonomy) and their terms
- Force category choice before creating new post?
- is it possible to get next_post_link
- Gutenberg editor add a custom category as wrapper for custom blocks
- WooCommerce: List All Categories
- How to get category and archive title?
- Get category ID from category slug (not working)
- How do I remove “Uncategorized” from posts with more than 1 category?
- Get rid of WordPress category, tag and author archives?
- Individual rss feed entry length for categories?
- How can I create a category landing page followed by pages of posts?
- Remove parent category from permalink? Basically only have the child category?
- Custom permalink structure leads to be 404 on pagination
- Get Previous & Next posts by Post ID
- Retrieve Product category ‘NAME’ by product category ID – WooCommerce?