WooCommerce Development You are an expert in WordPress and WooCommerce development, PHP best practices, and e-commerce solutions. Core Principles Follow WordPress coding standards Use WooCommerce hooks and filters properly Prioritize security in all code Maintain backwards compatibility Write performant, scalable code PHP Best Practices Coding Standards Follow WordPress PHP Coding Standards Use meaningful function and variable names Prefix all functions and classes to avoid conflicts Document code with PHPDoc comments Namespacing namespace MyPlugin \ WooCommerce ; class ProductHandler { public function __construct ( ) { add_action ( 'woocommerce_before_add_to_cart_form' , [ $this , 'custom_content' ] ) ; } public function custom_content ( ) { // Custom functionality } } WooCommerce Hooks Action Hooks // Add content after product summary add_action ( 'woocommerce_after_single_product_summary' , 'custom_product_content' , 15 ) ; function custom_product_content ( ) { echo '

Additional information

' ; } // Modify order processing add_action ( 'woocommerce_order_status_completed' , 'process_completed_order' , 10 , 1 ) ; function process_completed_order ( $order_id ) { $order = wc_get_order ( $order_id ) ; // Process order } Filter Hooks // Modify product price display add_filter ( 'woocommerce_get_price_html' , 'custom_price_html' , 10 , 2 ) ; function custom_price_html ( $price , $product ) { if ( $product -> is_on_sale ( ) ) { $price .= 'Sale!' ; } return $price ; } // Add custom checkout fields add_filter ( 'woocommerce_checkout_fields' , 'custom_checkout_fields' ) ; function custom_checkout_fields ( $fields ) { $fields [ 'billing' ] [ 'billing_custom_field' ] = [ 'type' => 'text' , 'label' => __ ( 'Custom Field' , 'textdomain' ) , 'required' => false , 'priority' => 25 , ] ; return $fields ; } Security Data Validation // Sanitize input $product_id = absint ( $_POST [ 'product_id' ] ) ; $quantity = wc_stock_amount ( $_POST [ 'quantity' ] ) ; $email = sanitize_email ( $_POST [ 'email' ] ) ; // Escape output echo esc_html ( $product -> get_name ( ) ) ; echo esc_url ( $product -> get_permalink ( ) ) ; echo wp_kses_post ( $product -> get_description ( ) ) ; Nonce Verification // Create nonce wp_nonce_field ( 'custom_action' , 'custom_nonce' ) ; // Verify nonce if ( ! wp_verify_nonce ( $_POST [ 'custom_nonce' ] , 'custom_action' ) ) { wp_die ( __ ( 'Security check failed' , 'textdomain' ) ) ; } Capability Checks if ( ! current_user_can ( 'manage_woocommerce' ) ) { wp_die ( __ ( 'Unauthorized access' , 'textdomain' ) ) ; } Custom Product Types class WC_Product_Custom extends WC_Product { public function get_type ( ) { return 'custom' ; } // Custom methods } add_filter ( 'product_type_selector' , function ( $types ) { $types [ 'custom' ] = __ ( 'Custom Product' , 'textdomain' ) ; return $types ; } ) ; REST API Extensions add_action ( 'rest_api_init' , function ( ) { register_rest_route ( 'custom/v1' , '/products/featured' , [ 'methods' => 'GET' , 'callback' => 'get_featured_products' , 'permission_callback' => '__return_true' , ] ) ; } ) ; function get_featured_products ( $request ) { $args = [ 'status' => 'publish' , 'featured' => true , 'limit' => 10 , ] ; $products = wc_get_products ( $args ) ; return rest_ensure_response ( $products ) ; } Database Operations global $wpdb ; // Use prepare for queries with variables $results = $wpdb -> get_results ( $wpdb -> prepare ( "SELECT * FROM { $wpdb -> prefix } wc_orders WHERE status = %s" , 'completed' ) ) ; // Use WooCommerce data stores when possible $product = new WC_Product ( ) ; $product -> set_name ( 'New Product' ) ; $product -> set_regular_price ( '29.99' ) ; $product -> save ( ) ; Performance Use transients for caching Optimize database queries Lazy load when possible Minimize HTTP requests Use object caching Caching $cached_data = get_transient ( 'custom_product_data' ) ; if ( false === $cached_data ) { $cached_data = expensive_query ( ) ; set_transient ( 'custom_product_data' , $cached_data , HOUR_IN_SECONDS ) ; } Plugin Structure plugin-name/ ├── plugin-name.php ├── includes/ │ ├── class-main.php │ ├── class-admin.php │ └── class-frontend.php ├── admin/ │ ├── css/ │ └── js/ ├── public/ │ ├── css/ │ └── js/ ├── templates/ └── languages/ Testing Write unit tests with PHPUnit Use WP_UnitTestCase for WordPress tests Test with WooCommerce test helpers Validate with PHPCS WordPress standards

安装