woocommerce_coupon_sort │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_coupon_sort', 'wp_kama_woocommerce_coupon_sort_filter', 10, 2 );

/**
 * Function for `woocommerce_coupon_sort` filter-hook.
 * 
 * @param  $sort   
 * @param  $coupon 
 *
 * @return 
 */
function wp_kama_woocommerce_coupon_sort_filter( $sort, $coupon ){

	// filter...
	return $sort;
}

$sort

-

$coupon

-

Where the hook is called

$coupon->sort = apply_filters( 'woocommerce_coupon_sort', $coupon->sort, $coupon );

Where the hook is used in WooCommerce