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---
post_title: Cart and Checkout - Legacy hooks
menu_title: Legacy Hooks
tags: reference
---
Below are the hooks that exist in WooCommerce core and that were brough over to WooCommerce Blocks.
Please note that the actions and filters here run on the server side. The client-side blocks won't necessarily change based on a callback added to a server side hook. [Please see our documentation relating to APIs for manipulating the blocks on the client-side ](./an-introduction-to-extensiblity-in-woocommerce-blocks/ ).
## Legacy Filters
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- [loop_shop_per_page ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#loop_shop_per_page )
- [wc_session_expiration ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#wc_session_expiration )
- [woocommerce_add_cart_item ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_add_cart_item )
- [woocommerce_add_cart_item_data ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_add_cart_item_data )
- [woocommerce_add_to_cart_quantity ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_add_to_cart_quantity )
- [woocommerce_add_to_cart_sold_individually_quantity ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_add_to_cart_sold_individually_quantity )
- [woocommerce_add_to_cart_validation ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_add_to_cart_validation )
- [woocommerce_adjust_non_base_location_prices ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_adjust_non_base_location_prices )
- [woocommerce_apply_base_tax_for_local_pickup ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_apply_base_tax_for_local_pickup )
- [woocommerce_apply_individual_use_coupon ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_apply_individual_use_coupon )
- [woocommerce_apply_with_individual_use_coupon ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_apply_with_individual_use_coupon )
- [woocommerce_cart_contents_changed ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_cart_contents_changed )
- [woocommerce_cart_item_permalink ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_cart_item_permalink )
- [woocommerce_get_item_data ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_get_item_data )
- [woocommerce_loop_add_to_cart_args ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_loop_add_to_cart_args )
- [woocommerce_loop_add_to_cart_link ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_loop_add_to_cart_link )
- [woocommerce_new_customer_data ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_new_customer_data )
- [woocommerce_pay_order_product_has_enough_stock ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_pay_order_product_has_enough_stock )
- [woocommerce_pay_order_product_in_stock ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_pay_order_product_in_stock )
- [woocommerce_registration_errors ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_registration_errors )
- [woocommerce_shipping_package_name ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_shipping_package_name )
- [woocommerce_show_page_title ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_show_page_title )
- [woocommerce_single_product_image_thumbnail_html ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/filters.md#woocommerce_single_product_image_thumbnail_html )
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## Legacy Actions
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- [woocommerce_add_to_cart ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_add_to_cart )
- [woocommerce_after_main_content ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_after_main_content )
- [woocommerce_after_shop_loop ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_after_shop_loop )
- [woocommerce_applied_coupon ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_applied_coupon )
- [woocommerce_archive_description ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_archive_description )
- [woocommerce_before_main_content ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_before_main_content )
- [woocommerce_before_shop_loop ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_before_shop_loop )
- [woocommerce_check_cart_items ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_check_cart_items )
- [woocommerce_created_customer ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_created_customer )
- [woocommerce_no_products_found ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_no_products_found )
- [woocommerce_register_post ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_register_post )
- [woocommerce_shop_loop ](https://github.com/woocommerce/woocommerce/tree/trunk/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/hooks/actions.md#woocommerce_shop_loop )