There are a variety of administrative WordPress hooks that are applied on a page by page basis. Some good examples can be found in the WP_List_Table object.
Example hooks based on screen ID
- manage_{$screen->id}_columns – Add or delete columns from various administrative pages.
- views_{$screen->id} – Display the number of objects belonging to each status type. (See below)
- bulk_actions-{$screen->id} – As of WordPress 3.2 this filter can only be used to remove bulk actions.
- manage_{$screen->id}_sortable_columns – Filter list of all, hidden and sortable columns.
![wordpress-screen-id1 views_{$screen->id} – Display the number of objects belonging to each status type.](https://shibashake.com/wordpress-theme/wp-content/uploads/2011/08/wordpress-screen-id1-520x265.jpg)
Get the WordPress Screen ID of a Page
An easy way to get your WordPress screen ID is to use the current_screen filter.
// Add to the admin_init action hook add_filter('current_screen', 'my_current_screen' ); function my_current_screen($screen) { if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) return $screen; print_r($screen); return $screen; }
Once the code above is in place, you can simply visit the page(s) of choice and get their screen ID.
![wordpress-screen-id3 Get the WordPress screen id of relevant pages.](https://shibashake.com/wordpress-theme/wp-content/uploads/2011/08/wordpress-screen-id3-520x198.jpg)
Add Filters to Multiple Screens
We can also use the current_screen hook to add in column, view, or bulk-action filters to all or multiple chosen screens.
function my_current_screen($screen) { if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) return $screen; add_filter('views_'.$screen->id, 'my_views_filter' ); return $screen; } function my_views_filter($links) { $links['shibashake'] = '<a href="http://shibashake.com">Visit ShibaShake.com</a>'; return $links; }
The code above adds a ShibaShake site link to all administrative pages that show number of objects by status type.
![wordpress-screen-id2 Add ShibaShake site link to all administrative pages that show number of object views.](https://shibashake.com/wordpress-theme/wp-content/uploads/2011/08/wordpress-screen-id2-520x217.jpg)
This multiple-screen-add functionality will be especially useful when we can append entries to the bulk-action drop down menu.
Is there a possibility to add a bulk_actions in an other way???
Hi
Great article (and great website, which is in my WordPress favorites for a long time !)
Do you know how to add comboboxes to taxonomies applied to custom post types (just behind the multiple screens filters) ?
I haven’t found any resource about this function 🙁
With my best regards
Cédric, from France
Hmmm, do you mean you want to add your own HTML input boxes to a custom taxonomy edit screen? I haven’t looked at this recently, but I would check out the add_tag_form_fields or $taxonomy_add_form_fields action hooks.