2. Returned posts are based on passed in arguments

4. The values in this array are used within the WP_Query->get_posts() method to build the final SQL query

6. Also used within the WP_Query->get_posts() method to assign defaults for required/unset query_vars

8. is_day – if query contains a day

9. is_feed – if query is for feed display

10. is_page - if query return single page (post type page)

11. is_single – if the query is for a single post

12. is_singular – if the query is for a single post object

13. ...

16. max_num_pages – number of pages based on the current posts_per_page and found_posts

17. post_count – number of posts in the current posts array

18. posts – array containing posts result

22. some template functions only use the global instance, ie next_post_link(), prev_post_link(), etc.

23. Example: query_posts(array('meta_key'=>'show', 'meta_value'=> $show->ID, 'paged'=>get_query_var('paged')));

27. posts_join – allows modification of the join statement

28. posts_orderby – allows modification of the order by statement

30. Example: function filter_where($where, $wp_query) { if(!is_admin() && ($wp_query->get('post_type') == 'background')) { $cur_time = time(); $where.= " AND (EndDate.meta_value is null OR EndDate.meta_value >= '$cur_time'; } return $where; }