I have a hierarchical taxonomy called ‘tarefa’
I have to display all posts from a child taxonomy. I used get_term_children function function to verify if the taxonomy parent has children.
If the taxonomy parent has children I will query posts by taxonomy children.
The problem is:
I have to query posts by taxonomy slug but the function get_term_children return an array of taxonomy IDS.
The question is:
How can I return a taxonomy slug by a taxonomy ID?
I have bit of trouble understanding your question. Taxonomy (like category) slug or term (like uncategorized) slug?
get_term_children() works with terms so I will stick with that.
Try this:
$term = get_term( $id, $taxonomy );
$slug = $term->slug;