Source View: posts_distinct

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

Line Code
1043
1044           // Apply post-paging filters on where and join.  Only plugins that
1045           // manipulate paging queries should use these hooks.
1046           $where = apply_filters('posts_where_paged', $where);
1047           $groupby = apply_filters('posts_groupby', $groupby);
1048           if ( ! empty($groupby) )
1049                $groupby = 'GROUP BY ' . $groupby;
1050           $join = apply_filters('posts_join_paged', $join);
1051           $orderby = apply_filters('posts_orderby', $q['orderby']);
1052           $distinct = apply_filters('posts_distinct', $distinct);
1053           $fields = apply_filters('posts_fields', "$wpdb->posts.*");
1054           $limits = apply_filters( 'post_limits', $limits );
1055           $found_rows = '';
1056           if ( !empty($limits) )
1057                $found_rows = 'SQL_CALC_FOUND_ROWS';
1058
1059           $request = " SELECT $found_rows $distinct $fields FROM $wpdb->posts $join WHERE 1=1 $where $groupby ORDER BY $orderby $limits";
1060           $this->request = apply_filters('posts_request', $request);
1061