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Source View: posts_fields

To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).

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
1393
1394           // Apply post-paging filters on where and join.  Only plugins that
1395           // manipulate paging queries should use these hooks.
1396
1397           $where = apply_filters('posts_where_paged', $where);
1398           $groupby = apply_filters('posts_groupby', $groupby);
1399           $join = apply_filters('posts_join_paged', $join);
1400           $orderby = apply_filters('posts_orderby', $q['orderby']);
1401           $distinct = apply_filters('posts_distinct', $distinct);
1402           $fields = apply_filters('posts_fields', "$wpdb->posts.*");
1403           $limits = apply_filters( 'post_limits', $limits );
1404
1405           // Announce current selection parameters.  For use by caching plugins.
1406           do_action( 'posts_selection', $where . $groupby . $orderby . $limits . $join );
1407
1408           // Filter again for the benefit of caching plugins.  Regular plugins should use the hooks above.
1409           $where = apply_filters('posts_where_request', $where);
1410           $groupby = apply_filters('posts_groupby_request', $groupby);
1411           $join = apply_filters('posts_join_request', $join);