Drupal is a open-source,modular CMS written in PHP
Drupal is a open-source web development platform for online content and user communities. Drupal powers some of the busiest sites on the web, and can be adapted to virtually any visual design.Drupal is based on PHP-MySQL. Drupal is extremely powerful and developer-friendly.Drupal is easy to customize with many different plug-ins, themes and other configurable options. For those with sufficient programming knowledge, it is possible to edit even the root files of the program,making it the most flexible .Drupal can be set up for anything from a simple blog to a content portal used by large corporations.
Drupal is built for high performance and is scalable to many servers, has easy integration via REST, JSON, SOAP and other formats.Drupal includes comprehensive content management features, including the ability to create new content types and import content from other sources.