WC Backorder Split

WC Backorder Split is a free WooCommerce extension that automatically creates a separate order with status "Backordered" for the products that you don't have in stock (Products on backorder). Key Features

• Automatic Order Splitting - Automatically splits orders when products are on backorder
• Complete Order Data Transfer - Copies shipping methods, payment info, fees, coupons and taxes to backorder
• Order Relationship Tracking - Links parent and backorder orders for easy reference
• Custom Order Status - Adds "Backordered" status to WooCommerce
• Order Notes - Automatically adds notes explaining the split to both orders
• Admin Interface - Shows linked orders directly in order details page
• HPOS Compatible - Full support for WooCommerce High-Performance Order Storage
• Developer Friendly - Extensive hooks and filters for customization

Developer Features Developers can extend the plugin using built-in hooks:

• wcbs_before_split_order - Action before order splitting
• wcbs_after_split_order - Action after order splitting
• wcbs_backorder_created - Action when backorder is created
• wcbs_split_order_error - Action on split error
• wcbs_should_split_order - Filter to prevent splitting
• wcbs_backorder_items - Filter to modify backorder items
• wcbs_backorder_status - Filter to change backorder status
• wcbs_meta_fields_to_copy - Filter to add/remove meta fields copied to backorder
• wcbs_disable_emails_on_split - Filter to control email suppression during split

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Minimum Requirements

• WooCommerce 3.0 or later
• Upload 'wc-backorder-split' to the '/wp-content/plugins/' directory or install the plugin through the WordPress plugins screen directly.
• Activate the plugin through the 'Plugins' menu in WordPress
• Done!

2.2.0 - 2026-05-06

• Enhancement - Backorder order creation now suppresses WooCommerce emails to prevent duplicate new-order and processing notifications.
• Enhancement - Backorder order now inherits all standard order fields: currency, prices include tax, customer IP, user agent, transaction ID, date paid, date completed, and stock reduced flag.
• Enhancement - WooCommerce order attribution and VAT exemption meta fields are now copied to the backorder order.
• Enhancement - Line items are cloned (not re-added via add_product) preserving product variations, custom fields, and all item-level meta data.
• Enhancement - Per-unit prices are captured before any order mutation so discount-adjusted totals remain correct on both orders.
• Enhancement - _reduced_stock meta is now split proportionally between the original and backorder order items.
• Enhancement - Address indexes (_billing_address_index, _shipping_address_index) are now copied to the backorder order for correct address search results (HPOS-aware).
• Enhancement - Both orders are scheduled for WooCommerce Admin analytics re-import after a split so revenue reports stay accurate.
• Enhancement - Added wcbs_meta_fields_to_copy and wcbs_disable_emails_on_split filters for developer extensibility.
• Fix - Stock quantity 0 at cart time now correctly removes the item from the original order instead of leaving it duplicated across both orders.
• Fix - Removed erroneous add_item() call after in-place source item update that caused calculate_totals() to double-count the item.

2.1.0 - 2026-02-17

• Security - Fixed unsanitized $_SERVER['REQUEST_URI'] access in REST API detection.
• Enhancement - Added comprehensive order data copying: shipping methods, payment info, fees, coupons, and taxes.
• Enhancement - Added order relationship linking between parent order and backorder.
• Enhancement - Added order notes to both orders explaining the split operation.
• Enhancement - Added admin panel display showing linked orders in order details.
• Enhancement - Added developer hooks for extensibility (wcbs_before_split_order, wcbs_after_split_order, wcbs_backorder_created, wcbs_split_order_error).
• Enhancement - Added filter hooks for customization (wcbs_should_split_order, wcbs_backorder_items, wcbs_backorder_status).
• Enhancement - Improved item meta data copying during split to preserve product variations and custom data.
• Enhancement - Added comprehensive PHPDoc documentation with @since tags throughout codebase.
• Fix - Critical: Added protection against duplicate order splits on page reload.
• Fix - Fixed fatal error "Call to a member function save() on int" when copying item meta data.
• Fix - Fixed order splitting logic to work correctly when product stock status is already 'onbackorder'.
• Fix - Removed unnecessary is_on_backorder() check that prevented stock quantity tracking.
• Fix - Properly retrieve order item objects after add_product() to enable meta data copying.
• Fix - Updated version number consistency across all plugin files.
• Fix - Updated @version tags in PHPDoc blocks to reflect current version.
• Fix - Made bulk action text translatable for better localization support.
• Fix - Added return value to is_request() method for better error handling.

2.0 - 2025-11-10

• Security - Added CSRF protection with nonce validation for AJAX requests.
• Security - Added capability checks for admin operations.
• Security - Enhanced input validation and sanitization.
• Enhancement - Improved error handling with try-catch blocks and logging.
• Enhancement - Added comprehensive PHPDoc documentation.
• Enhancement - Optimized performance by loading admin styles only on relevant pages.
• Enhancement - Improved database query efficiency using specific item types.
• Enhancement - Enhanced product and order validation throughout the codebase.
• Enhancement - Added detailed error logging for debugging and monitoring.
• Fix - Fixed class reference in singleton pattern documentation.
• Fix - Improved code structure and readability.
• Tweak - Maintained full HPOS (High-Performance Order Storage) compatibility.

1.9 - 2025-05-14

• Enhancement - WooCommerce Version 9.8.5 compatibility added.

1.8 - 2024-07-29

• Enhancement - WooCommerce Version 9.1.4 compatibility added.
• Enhancement - WooCommerce High Performance Order Storage compatibility added.

1.7 - 2022-06-09

• Enhancement - WooCommerce Version 6.5.1 compatibility added.

1.6 - 2021-01-16

• Fix - Negative stocks checking issue fixed.

1.5 - 2021-01-15

• Fix - Parent order quantity issue fixed.
• Tweak - WC 4.9.0 support added.

1.4 - 2020-06-12

• Enhancement - Deactivation feedback form added.
• Enhancement - Plugin structure updated.
• Tweak - WC 4.2 support added.

1.3 - 2019-06-13

• Order status updation issue fixed

1.2 - 2019-06-11

• Order splitting bug fixes

1.1 - 2019-04-8

• Guest user data in backorder bug fixed

1.0

• Initial release