woocommerce_cart_hash │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_cart_hash', 'wp_kama_woocommerce_cart_hash_filter', 10, 2 );

/**
 * Function for `woocommerce_cart_hash` filter-hook.
 * 
 * @param  $hash         
 * @param  $cart_session 
 *
 * @return 
 */
function wp_kama_woocommerce_cart_hash_filter( $hash, $cart_session ){

	// filter...
	return $hash;
}

$hash

-

$cart_session

-

Where the hook is called

return apply_filters( 'woocommerce_cart_hash', $hash, $cart_session );

Where the hook is used in WooCommerce