February 12, 2011 
Definition:
function postbox_classes( $id, $page ) {}
Returns the list of classes to be used by a metabox
Parameters
- unknown_type $id
- unknown_type $page
Defined filters
- postbox_classes_{$page}_{$id}
apply_filters( "postbox_classes_{$page}_{$id}", $classes )
Source code
function postbox_classes( $id, $page ) {
if ( isset( $_GET['edit'] ) && $_GET['edit'] == $id ) {
$classes = array( '' );
} elseif ( $closed = get_user_option('closedpostboxes_'.$page ) ) {
if ( !is_array( $closed ) ) {
$classes = array( '' );
} else {
$classes = in_array( $id, $closed ) ? array( 'closed' ) : array( '' );
}
} else {
$classes = array( '' );
}
$classes = apply_filters( "postbox_classes_{$page}_{$id}", $classes );
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