unlocking the magical powers of wp_query
TRANSCRIPT
The Loop
How to Get Posts?query_posts()
Not a good way do it because it:
• Creates a new WP_Query object with whatever parameters you set.
• Replaces the existing main query loop with a new one (that is no longer the main query)
https://developer.wordpress.com/2012/05/14/querying-posts-without-query_posts/
How to Get Posts?get_posts()
• Returns an array of posts • You can’t use the helper functions the_title(),
the_content, etc. • Uncached function, so results wouldn’t be
cached in some areas like WordPress.com VIP
How to Get Posts?new WP_Query()
• Sets up a new query object • You can use the_content(), the_title(), etc. • Actually powers both query_posts() and
get_posts() behind the scenes as well as the main query
• Flexible to use for all kinds of post queries.
What is an object? A class?
Using the WP_Query Class
Some of the parameters you can pass to WP_Query
• author • category
• cat (id) • category_name • cat__in • cat__not_in
• tax_query • post_type • posts_per_page • post_parent • post_status
• order • orderby • date_query • year • month_num • meta_key • meta_value • meta_query • has_password • post__in • name • s
Properties of WP_Query
• $query • $query_vars • $queried_object • $queried_object_id • $posts • $post_count • $found_posts • $max_num_pages • $current_post • $post
• $is_single, $is_page, $is_archive, $is_preview, $is_date, $is_year, $is_month, $is_time, $is_author, $is_category, $is_tag, $is_tax, $is_search,$is_feed, $is_comment_feed, $is_trackback, $is_home, $is_404, and more…
Methods of WP_Query• the_post() • have_posts() • rewind_posts() • get_queried_object() • get_queried_object_id() • get( $query_var ) • set( $query_var, $value )
