woocommerce_upsells_columns │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_upsells_columns', 'wp_kama_woocommerce_upsells_columns_filter' );

/**
 * Function for `woocommerce_upsells_columns` filter-hook.
 * 
 * @param  $args[columns] 
 *
 * @return 
 */
function wp_kama_woocommerce_upsells_columns_filter( $args[columns] ){

	// filter...
	return $args[columns];
}

$args[columns]

-

Where the hook is called

wc_set_loop_prop( 'columns', apply_filters( 'woocommerce_upsells_columns', isset( $args['columns'] ) ? $args['columns'] : $columns ) );

Where the hook is used in WooCommerce