Specific header image for specific category?

Hi,

It seems that what you want is far more complicated than what I had understood from your original post, but it is still feasible.
Let me see if I understand you correctly. Right now, you have rotating images for your entire site (Home, Posts, Pages, Archives, etc.), but you want a separate set of images for your Blog category.
What I don’t understand is if you want that separate set of images for single blog post view or also for the Blog archive.

Oh, your code didn’t make it because it got moderated. The rule is that if the code exceeds 10 lines, you have to use a code paste bin, such as Pastebin. So please paste your custom functions.php and category.php code there with “PHP Syntax highlighting”. You can make two pastes or one big one, marking which one is which with a comment. One line comments are introduced with // or #. For comments that span through more than one line, you have to use /* text here */. Then simply share the links to your paste(s).

Cheers!

Yeah, you are right: it is more useful to read the code from that link you shared.
Where are you currently storing the regular rotating images (I mean, the ones that are showing everywhere else on the site?

Ok,

I just finished reading (and understanding) all the thread and all the code shared by Syahir.
The last version of the code he posted, with very minor adjustments, should display a random image for all posts under the category juicy-travels-blog from the following directory:

graphene/images/custom-headers/[sub-category_slug]

where sub-category_slug is the slug of the juicy-travels-blog subcategory underwhich the post is filed.
So, say you have a post with the parent category juicy-travels-blog and the sub-category (hierarchically defined as such under WP Admin Panel -> Posts -> Categories) blog jokes. The slug of that subcategory would be blog-jokes, so you would have to upload the image(s) you want to display for that blog subcategory to the directory:

graphene/images/custom-headers/blog-jokes

That should display a specific image for that subcategory.

The revised code you have to paste inside functions.php is here. Please delete the previous version (you can make a backup before if you wish).

Please note there are two functions there:
The first one, post_is_in_descendant_category, is a custom WP function that comes from the in_category Codex article;
The second one is the modified version of the function posted by Syahir.

Let me know if there is any progress.

You are welcome, 🙂
The code I just posted should not tamper with your current image rotator, because it checks whether the post is inside the blog category or is a descendant of that category and then works its magic.
However, since I am not very familiar with the theme, I’m not 100% sure it will work, but hopefully with some additional tuning we should be able to get it to work.
Let me know how it goes.

Hi Laura,

I just saw your posts. I’ll run some tests on my test blog tomorrow and get back to you about this.
What I can answer with confidence, because I tested it before, is that get_stylesheet_directory_uri does retrieve the URL of the child theme, not the parent one.

Have a good night!