Woocommerce : les catégories de produit

function get_categories( $post_id ) {
	$categories = get_the_terms( $post_id, 'product_cat' );
	if ( $categories ) {
		foreach ( $categories as $categorie ) {
			$datas[] = $categorie->name;
		}
		return join( ',', $datas );
	}
}
echo get_categories( 42 );

function get_categorie( $post_id ) {
	$categories = get_the_terms( $post_id, 'product_cat' );
	if ( $categories ) {
		foreach ( $categories as $categorie ) {
			return $categorie->name;
		}
	}
}
echo get_categorie( 42 );

function get_categorie_parente( $post_id ) {
	$categories = get_the_terms( $post_id, 'product_cat' );
	if ( $categories ) {
		foreach ( $categories as $categorie ) {
			if ( $categorie->parent ) {
				$parent = get_term( $categorie->parent, 'product_cat' );
				return $parent->name; 
			}
		}
	}
}
echo get_categorie_parente( 42 );