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wordpress - Test If WP_Query Object Is Empty - Stack Overflow

    https://stackoverflow.com/questions/10952442/test-if-wp-query-object-is-empty
    Right, but I am looking to display non-query information on the page depending on if the the query has any content. This information is displayed in a different part of the page along side the actually query. So I want to create a single WP_Query object at the top of the page, and then output the information at multiple parts of the page.

Empty search input returns all posts - WordPress ...

    https://wordpress.stackexchange.com/questions/216694/empty-search-input-returns-all-posts
    Instead we could try to halt the main query, in the case of an empty search: /** * Halt the main query in the case of an empty search */ add_filter( 'posts_search', function( $search, \WP_Query $q ) { if( ! is_admin() && empty( $search ) && $q->is_search() && $q->is_main_query() ) $search .=" AND 0=1 "; return $search; }, 10, 2 );

WP_Query Class WordPress Developer Resources

    https://developer.wordpress.org/reference/classes/wp_query/
    NOTE: Ticket #28099: Passing an empty array to post__in will return has_posts() as true (and all posts will be returned). ... Note: if the query is in a feed, wordpress overwrites this parameter with the stored ‘posts_per_rss’ option. To reimpose the limit, try using the ‘post_limits’ filter, or filter ‘pre_option_posts_per_rss’ and ...

Querying posts with a false or NULL meta value – — The ...

    https://thethemefoundry.com/blog/query-posts-wordpress-false-null-meta-value/
    Apr 24, 2012 · As I did a bit of searching, I found this core ticket which is going to allow searching for NULL meta values in WordPress 3.4. However, I had 2 problems with this solution: WordPress 3.4 isn’t out yet (duh) and we need to support a couple of versions back, anyhow. I needed to modify the main query.

WP_Meta_Query Class WordPress Developer Resources

    https://developer.wordpress.org/reference/classes/wp_meta_query/
    Top ↑ More Information # More Information. Top ↑ Description # Description. WP_Meta_Query is a class defined in wp-includes/meta.php that generates the necessary SQL for meta-related queries. It was introduced in Version 3.2.0 and greatly improved the possibility to query posts by custom fields.

WP_User_Query Class WordPress Developer Resources

    https://developer.wordpress.org/reference/classes/wp_user_query/
    if ( ! empty( $qv['date_query'] ) && is_array( $qv['date_query'] ) ) { $date_query = new WP_Date_Query( $qv['date_query'], 'user_registered' ); $this->query_where .= $date_query->get_sql(); } /** * Fires after the WP_User_Query has been parsed, and before * the query is executed.
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