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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
2378           // Apply post-paging filters on where and join.  Only plugins that
2379           // manipulate paging queries should use these hooks.
2380           if ( !$q['suppress_filters'] ) {
2381                $where          = apply_filters_ref_array( 'posts_where_paged',     array( $where, &$this ) );
2382                $groupby     = apply_filters_ref_array( 'posts_groupby',          array( $groupby, &$this ) );
2383                $join          = apply_filters_ref_array( 'posts_join_paged',     array( $join, &$this ) );
2384                $orderby     = apply_filters_ref_array( 'posts_orderby',          array( $orderby, &$this ) );
2385                $distinct     = apply_filters_ref_array( 'posts_distinct',     array( $distinct, &$this ) );
2386                $limits          = apply_filters_ref_array( 'post_limits',          array( $limits, &$this ) );
2387                $fields          = apply_filters_ref_array( 'posts_fields',          array( $fields, &$this ) );
2388           }
2389
2390           // Announce current selection parameters.  For use by caching plugins.
2391           do_action( 'posts_selection', $where . $groupby . $orderby . $limits . $join );
2392
2393           // Filter again for the benefit of caching plugins.  Regular plugins should use the hooks above.
2394           if ( !$q['suppress_filters'] ) {
2395                $where          = apply_filters_ref_array( 'posts_where_request',     array( $where, &$this ) );
2396                $groupby     = apply_filters_ref_array( 'posts_groupby_request',          array( $groupby, &$this ) );