RSS is now a widespread means of announcing new content of a Web site, in a way that programs and other sites can process conveniently to show their users about new content of interest.
RSS feeds are in XML format, but the feeds also need to comply with RSS specifications, so they can be processed correctly by the programs and sites that syndicate the feeds.
feedvalidator.org is a site that provides a validation service to verify whether a feed is compliant with the different versions of the RSS specification standards.
This class provides a wrapper to access this validation service automatically from PHP scripts, thus making it possible to implement systematic validations every time an RSS feed is updated.