default secondary title for specific categories

Hi @domeniko89,

Thanks for posting your question.

Secondary Title has a couple of filter hooks that allow you to filter where and how the secondary title will show up. In this case, it’s the filter get_secondary_title.

In that function, you’d have to check if the current post contains the category ID you’d like to have filtered out. You may also want to check if you’re on the Dashboard, otherwise, you won’t see the secondary title in the post overview.

Here’s a snippet that should work. I added a few comments, I hope this helps.

add_filter( "get_secondary_title", function ( string $secondary_title, int $post_id ) {
    /** @var \WP_Post $post The original post */
    $post = get_post( $post_id );

    /** @var int $category_id The category ID (!) that should be filtered out */
    $category_id = 1;

    /** @var string $title Our new title */
    $title = '';

    /** If we're in the Dashboard or the filtered category ID isn't part of the post, show secondary title */
    if ( is_admin() || ! in_array( $category_id, (array) $post->post_category ) ) {
        $title = $secondary_title;
    }

    /** Otherwise, use the default title */
    return (string) $title;
}, 10, 2 );

If it doesn’t help, please let me know. Also please note that this snippet just detects one category ID. However, checking for numerous category IDs is just a small adjustment.

Did you change the $category_id to the ID of the category you wanted to filter out?

If I’ve earned your trust (as many other before you have, see the reviews section), I can take a manual look for you. Please send me the (S)TFP details to my email address which is kolja.nolte @ gmail.com.