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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
|---|---|
| 1411 | if ( $post_ids ) |
| 1412 | $where = "AND $wpdb->posts.ID IN ($post_ids) "; |
| 1413 | else |
| 1414 | $where = "AND 0"; |
| 1415 | } |
| 1416 | |
| 1417 | // Apply post-paging filters on where and join. Only plugins that |
| 1418 | // manipulate paging queries should use these hooks. |
| 1419 | |
| 1420 | $where = apply_filters('posts_where_paged', $where); |
| 1421 | $groupby = apply_filters('posts_groupby', $groupby); |
| 1422 | $join = apply_filters('posts_join_paged', $join); |
| 1423 | $orderby = apply_filters('posts_orderby', $q['orderby']); |
| 1424 | $distinct = apply_filters('posts_distinct', $distinct); |
| 1425 | $fields = apply_filters('posts_fields', "$wpdb->posts.*"); |
| 1426 | $limits = apply_filters( 'post_limits', $limits ); |
| 1427 | |
| 1428 | // Announce current selection parameters. For use by caching plugins. |
| 1429 | do_action( 'posts_selection', $where . $groupby . $orderby . $limits . $join ); |