Curl multi sitemap is a PHP class that can be used to generate multiple sitemaps by crawling sites. It can crawl one or more sites to retrieve their pages and follow links recursively and determine the addresses of all pages to include in an XML sitemap. It can ignore given URLs to avoid crawling and including in the sitemap. The class uses the Curl extension multi-request support to retrieve multiple pages at the same time. You can also notify such services as Google, Yahoo, Bing, Ask, and Moreover about your sitemap update.