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apply_filters( "postbox_classes_{$screen_id}_{$box_id}", string[] $classes )

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

Description

The dynamic portions of the hook name, $screen_id and $box_id, refer to the screen ID and meta box ID, respectively.

Parameters

$classes

(string[]) An array of postbox classes.

Source

File: wp-admin/includes/post.php

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Used By

Used By Description
wp-admin/includes/post.php: postbox_classes()

Returns the list of classes to be used by a meta box.

Changelog

Version Description
3.2.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/postbox_classes_screen_id_box_id