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 hooc name, $screen_id and $box_id , refer to the screen ID and meta box ID, respectively.

$classes = apply_filters( "postbox_classes_{$screen_id}_{$box_id}", $classes );

Used by	Description
postbox_classes() `wp-admin/includes/post.php`	Returns the list of classes to be used by a meta box.

Versionen	Description
3.2.0	Introduced.

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