postbox_classes_<page>_<id>

Filters the postbox classes for a specific screen and screen ID combo.

Description

apply_filters( 'postbox_classes_<page>_<id>', (array) $classes ); 

The dynamic portions of the hook name refer refer to the screen and screen ID, respectively.

Parameters (1)

0. $classes (array)
An array of postbox classes.

Usage

To run the hook, copy the example below.
  1. $classes = apply_filters( 'postbox_classes_{$page}_{$id}', $classes ); 
  2.  
  3. if ( !empty( $classes ) ) { 
  4.  
  5. // everything has led up to this point... 
  6.  
  7.  
The following example is for adding a hook callback.
  1. // define the postbox_classes_<page>_<id> callback 
  2. function filter_postbox_classes_page_id( $classes ) { 
  3. // make filter magic happen here... 
  4. return $classes
  5. }; 
  6.  
  7. // add the filter 
  8. add_filter( "postbox_classes_{$page}_{$id}", 'filter_postbox_classes_page_id', 10, 1 ); 
To remove a hook callback, use the example below.
  1. // remove the filter 
  2. remove_filter( "postbox_classes_{$page}_{$id}", 'filter_postbox_classes_page_id', 10, 1 ); 

Defined (1)

The filter is defined in the following location(s).

/wp-admin/includes/post.php  
  1. $classes = apply_filters( "postbox_classes_{$page}_{$id}", $classes );