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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
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621 | $where .= " AND post_date >= '$end_date' AND post_date <= '$start_date'"; |
622 | } else { |
623 | $where .= " AND post_date >= '$end_date'"; |
624 | } |
625 | } |
626 | } |
627 |
|
628 | // Apply post-paging filters on where and join. Only plugins that |
629 | // manipulate paging queries should use these hooks. |
630 | $where = apply_filters('posts_where_paged', $where); |
631 | $groupby = " $wpdb->posts.ID "; |
632 | $groupby = apply_filters('posts_groupby', $groupby); |
633 | $join = apply_filters('posts_join_paged', $join); |
634 | $orderby = "post_" . $q['orderby']; |
635 | $orderby = apply_filters('posts_orderby', $orderby); |
636 | $request = " SELECT $distinct * FROM $wpdb->posts $join WHERE 1=1" . $where . " GROUP BY " . $groupby . " ORDER BY " . $orderby . " $limits"; |
637 | $request = apply_filters('posts_request', $request); |
638 |
|
639 | $this->posts = $wpdb->get_results($request); |