WooCommerce Fundamentals

Products (product): The items you sell. Each product is a post with custom fields.

Orders (shop_order): Customer transactions. Contains line items, shipping, billing.

Coupons (shop_coupon): Discount codes with rules and restrictions.

Refunds (shop_order_refund): Linked to parent orders.

Simple: Single product, single price (e.g., a book).

Variable: Product with variations like size/color (stored as product_variation CPT).

Grouped: Collection of simple products sold together.

External/Affiliate: Links to products sold elsewhere.

wp_posts + wp_postmeta: Products, orders stored as custom post types.

wp_woocommerce_order_items: Line items for orders.

wp_woocommerce_order_itemmeta: Meta data for line items.

wp_wc_product_meta_lookup: Optimized product queries (price, stock).

wp_woocommerce_sessions: Cart and session data.

/wp-content/plugins/woocommerce/: Core plugin files.

/includes/: PHP classes for core functionality.

/templates/: Default template files (copy to theme to override).

/assets/: CSS, JS, and images.

Copy templates from /plugins/woocommerce/templates/ to /themes/your-theme/woocommerce/.

Example: Override single-product.php by copying to /your-theme/woocommerce/single-product.php.

Never edit plugin files directly—updates will overwrite them.

woocommerce_before_main_content: Before shop/product content.

woocommerce_after_shop_loop_item: After each product in loop.

woocommerce_before_add_to_cart_button: Before 'Add to Cart' button.

woocommerce_thankyou: On order confirmation page.

woocommerce_checkout_order_processed: When order is created.

woocommerce_product_tabs: Modify product page tabs.

woocommerce_checkout_fields: Add/remove checkout fields.

woocommerce_get_price_html: Modify price display.

woocommerce_email_headers: Customize email headers.

WooCommerce > Status > System Status.

Shows PHP version, memory limits, database info, active plugins.

Click 'Get System Report' to copy full report for support.

WooCommerce > Status > Logs.

View fatal errors, payment gateway logs, shipping logs.

Enable debug mode: define('WP_DEBUG', true); in wp-config.php.

Query Monitor: Database queries, hooks, HTTP requests.

WooCommerce Logger: Enhanced logging capabilities.

Health Check: Disables plugins/theme for troubleshooting.