Getting all post/page IDs related to a soon-to-be-deleted tag/cat

In this function the earliest hook is “delete_term_taxonomy”. However, it seems like the relationships are already deleted before this hook fires.

According to the source, 'delete_term_taxonomy' runs just before deletion and 'deleted_term_taxonomy' runs just after. There are other things going on before this code, like the child relationships are changed.

do_action( 'delete_term_taxonomy', $tt_id );
$wpdb->delete( $wpdb->term_taxonomy, array( 'term_taxonomy_id' => $tt_id ) );
do_action( 'deleted_term_taxonomy', $tt_id );

Are you sure you were not using 'deleted_term_taxonomy' by mistake?

Is there any other hook I can use?

If the taxonomy is hierarchical, 'edit_term_taxonomies' and 'edited_term_taxonomies' run first:

do_action( 'edit_term_taxonomies', $edit_tt_ids );
$wpdb->update( $wpdb->term_taxonomy, compact( 'parent' ), array( 'parent' => $term_obj->term_id) + compact( 'taxonomy' ) );
do_action( 'edited_term_taxonomies', $edit_tt_ids );

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