easy modifier code doesnt work

Hi, @steelclover!

The official WordPress API documentation states that the_category_ID is deprecated. You should use the get_the_category/ function, with an optional parameter $post_id.

Thank you.

That gives me Array as result.

True. Does your post have several categories, or only one?
It you only have one category, you can use get_the_category( $post_id <optional>)[0]->name to get the category name:
class ="category-<?php echo get_the_category($post_id)[0]->name; ?>"
replace $post_id with the correct id, or remove it.

As for the get_query_var('name');: are you sure there is a ‘name’ variable in your query?

Thank you again : )

the post-part wasnt broken. i tried all but its still not working.

Here is what ive got:

<div class ="category-<?php echo the_category_ID( $echo ); ?>">
do something
</div>

the above prints over years:

<div class ="category-biersorten">
do something
</div>

now it shows:

<div class ="category-">
do something
</div>

ive tried:

<div class ="category-<?php echo get_the_category()[0]->name; ?>"
do something
</div>

and it shows:

<div class ="category-">
do something
</div>

It works until i did the update. I have another sites running that old code and it still works. But all updated Sites are now broken.

May you can have a look at it.
forget about the id=”post” – this still works.

• This reply was modified 3 years, 8 months ago by Steelclover.

I didn’t give you the full information, sorry.
You can omit post_id only if you are using get_the_category inside the loop. If you are using it outside the loop, you need to pass the post_id parameter.

So, the code would look something like this:

<div class ="category-<?php echo get_the_category($post->ID)[0]->name ?>">
<?php echo get_the_category($post->ID)[0]->name ?>
</div>

• This reply was modified 3 years, 8 months ago by Olga Bulat. Reason: Added the sample code

oops i think something went wrong ??

As i can see by now it depends on if its a clean installed wordpress site or just updated.

however
the_category_ID( $echo ); still works on new clean version
the_category_ID( $echo ); still works on older version
the_category_ID( $echo ); stops workin on updated version
get_the_category($post->ID)[0]->name works on new clean version
get_the_category($post->ID)[0]->name does not work on updated version

i think there must be some issues within the progress of updating.

but thank you. now i know how to get it work.

• This reply was modified 3 years, 8 months ago by Steelclover. Reason: spelling

Interesting! I’m glad you’ve figured it out.