how to return all image ID's in a category

Hello @bsapaka,

Lets assume your taxonomy name is ‘media_category’ and its term ID (category ID) is 5. Then you have to use code like:

$ids = get_posts( array(
    'post_type' => 'attachment',
    'post_status' => 'any',
    'posts_per_page' => -1, // get all
    'tax_query' => array(
        array(
            'taxonomy' => 'media_category',
            'field' => 'id',
            'terms' => 5,
        ),
    ),
    'fields' => 'ids', // only get IDs
));

-Nadia