Main Query (category)
| add_query_arg() | Retrieves a modified URL query string. |
| get_queried_object() | Retrieve the currently-queried object. |
| get_queried_object_id() | Gets the ID of the current query object. It can be: any post, category, tag, other taxonomy element, author's archive. |
| get_query_var() | Retrieve variable in the WP_Query class. |
| get_search_query() | Retrieves the contents of the search WordPress query variable. |
| get_status_header_desc() | Retrieve the description for the HTTP status. |
| is_embed() | Is the query for an embedded post? |
| is_robots() | Checks if this is a request to robots.txt file. A conditional tag. |
| redirect_canonical() | Redirects incoming links to the proper URL based on the site url. |
| remove_query_arg() | Removes an item or items from a query string. |
| wp() | Set up the WordPress query. |