Open Sitemap Generator

Dynamic XML sitemap generator for WordPress with automatic pagination, IndexNow support (Bing/Yandex), Google Rich Results for WooCommerce, and Google notification. Optimized for WooCommerce stores with tens of thousands of products.

Features

• Automatic pagination — Splits sitemaps into files of 10,000 URLs (configurable). 40,000 products = 4 sitemap files, automatically
• Optimized database queries — Direct SQL with LIMIT/OFFSET, never loads 40,000+ WP_Post objects into memory
• Google Rich Results — Enhances WooCommerce product schema with shipping, return policy, reviews, and seller data for better search visibility
• IndexNow queued mode — URLs queued and sent in batches via WP-Cron, never blocks WooCommerce stock sync loops
• Stock update filtering — Ignores changes that only affect stock quantity/status (compares title, content, price, SKU)
• Google notification — Automatic robots.txt sitemap declaration + optional ping
• Bing/Yandex notification — Instant via IndexNow protocol with configurable batch scheduling
• Full admin dashboard — Statistics, queue management, Rich Results self-test, activity log, one-click actions

Google Rich Results

The Rich Results module adds structured data (JSON-LD) to WooCommerce products for improved Google search appearance:

Schema Field	Type	Description
shippingDetails	OfferShippingDetails	Shipping cost (read from WooCommerce zones), destination country, handling + transit times
hasMerchantReturnPolicy	MerchantReturnPolicy	Return days, return fees, return shipping cost, policy URL
aggregateRating	AggregateRating	Average rating and review count
review	Review[]	Individual reviews with author, rating, date, body
seller	Organization	Merchant name and URL inside offers
Product name	Truncation	Truncates names exceeding max length (default 150 chars)

Configuration

Go to Settings > Open Sitemap > Opzioni Rich Results and configure:

• Merchant name and URL
• Shipping country (ISO 3166-1 alpha-2)
• Handling and transit times
• Return policy (days, URL, fees type, shipping fees amount)
• Reviews (enable/disable, max per product)
• Product name max length

Self-Test

Click "Esegui Test Rich Results" in the admin dashboard to validate schema generation on a real product. The test checks:

• WooCommerce active
• Merchant configured
• Return policy URL
• Schema generation on a real product
• All required fields: shippingRate, shippingDestination, deliveryTime, returnPolicy, returnShippingFeesAmount, aggregateRating/review, seller in offers

Sitemap Structure

With 40,000 products and 10,000 URLs/file limit:

sitemap.xml (index)
├── sitemap-pages-1.xml        (pages)
├── sitemap-products-1.xml     (products 1-10,000)
├── sitemap-products-2.xml     (products 10,001-20,000)
├── sitemap-products-3.xml     (products 20,001-30,000)
├── sitemap-products-4.xml     (products 30,001-40,000)
└── sitemap-categories-1.xml   (categories)

Search Engine Notifications

Engine	Method	Status
Google	robots.txt + Search Console + Rich Results	Automatic
Bing	IndexNow (queued batch)	Instant
Yandex	IndexNow (shared from Bing)	Instant

Note: Google does NOT support IndexNow. The primary method for Google is robots.txt + manual Search Console registration. Rich Results improve product visibility in search.

Requirements

• WordPress 5.0+
• PHP 7.4+
• WooCommerce (optional, required for product support and Rich Results)

Installation

From GitHub

1. Download the latest release ZIP
2. In WordPress admin: Plugins > Add New > Upload Plugin
3. Upload the ZIP file and activate
4. Go to Settings > Permalinks and click Save (activates rewrite rules)
5. Go to Settings > Open Sitemap and configure

Manual

1. Clone or download this repository
2. Copy the open-sitemap-generator folder to /wp-content/plugins/
3. Activate in WordPress admin
4. Save Permalinks and configure

Configuration

Recommended settings for e-commerce

Setting	Value	Why
Queue mode	Hourly	Batches stock sync updates
Exclude stock-only updates	Enabled	Prevents quota waste during bulk imports
Max URLs per sitemap	10,000	Good balance of performance and size
Batch size	100	Safe for most hosting
Ping Google on change	Enabled	Deprecated but harmless
Rich Results	Enabled	Better product visibility in Google
Merchant name	Your store name	Required for seller schema
Return days	14	EU standard

WP-Cron accuracy

WordPress uses a pseudo-cron triggered by site visits. For guaranteed timing:

1. Add to wp-config.php:

   define('DISABLE_WP_CRON', true);

2. Add system cron (cPanel/Plesk):

   */15 * * * * wget -q -O - https://yoursite.com/wp-cron.php?doing_wp_cron >/dev/null 2>&1

For sites with regular traffic, the default WP-Cron is sufficient.

File Structure

open-sitemap-generator/
├── open-sitemap-generator.php    # Main plugin file (v1.4.0)
├── includes/
│   ├── class-indexnow.php        # IndexNow queue system
│   └── class-rich-results.php    # Google Rich Results schema enhancement
├── admin/
│   ├── settings-page.php         # Admin dashboard
│   ├── style.css                 # Admin styles
│   └── script.js                 # Admin AJAX handlers
├── CHANGELOG.md                  # Full version history
├── README.md                     # This file
├── LICENSE                       # GPL v2
└── readme.txt                    # WordPress.org format

Hooks & Filters

Actions

• osg_notify_google — Fires when Google ping is scheduled
• osg_indexnow_process_queue — Fires when IndexNow queue is processed

Filters

• robots_txt — Adds sitemap URL to robots.txt
• woocommerce_structured_data_product — Rich Results module enhances product JSON-LD (priority 99)

Contributing

1. Fork the repository
2. Create a feature branch: git checkout -b feature/my-feature
3. Commit changes: git commit -m 'Add my feature'
4. Push: git push origin feature/my-feature
5. Open a Pull Request

Please see CHANGELOG.md for the development roadmap and known limitations.

License

This project is licensed under the GPL v2 or later — see LICENSE for details.

Credits

Developed by quakef4.