wp-includes/post.php:2192Builds an object with custom-something object (post type, taxonomy) labels out of a custom-something object
$data_objectobject$nohier_vs_hier_defaultsarrayobjectfunction _get_custom_object_labels( $data_object, $nohier_vs_hier_defaults ) { $data_object->labels = (array) $data_object->labels; if ( isset( $data_object->label ) && empty( $data_object->labels['name'] ) ) { $data_object->labels['name'] = $data_object->label; } if ( ! isset( $data_object->labels['singular_name'] ) && isset( $data_object->labels['name'] ) ) { $data_object->labels['singular_name'] = $data_object->labels['name']; } if ( ! isset( $data_object->labels['name_admin_bar'] ) ) { $data_object->labels['name_admin_bar'] = isset( $data_object->labels['singular_name'] ) ? $data_object->labels['singular_name'] : $data_object->name; } if ( ! isset( $data_object->labels['menu_name'] ) && isset( $data_object->labels['name'] ) ) { $data_object->labels['menu_name'] = $data_object->labels['name']; } if ( ! isset( $data_object->labels['all_items'] ) && isset( $data_object->labels['menu_name'] ) ) { $data_object->labels['all_items'] = $data_object->labels['menu_name']; } if ( ! isset( $data_object->labels['archives'] ) && isset( $data_object->labels['all_items'] ) ) { $data_object->labels['archives'] = $data_object->labels['all_items']; } $defaults = array(); foreach ( $nohier_vs_hier_defaults as $key => $value ) { $defaults[ $key ] = $data_object->hierarchical ? $value[1] : $value[0]; } $labels = array_merge( $defaults, $data_object->labels ); $data_object->labels = (object) $data_object->labels; return (object) $labels;}Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.