Drupal is a popular content managament system (cms) written in PHP – mostly considered off-topic. Questions about installing and maintaining Drupal belong on Drupal.SE
Drupal is a free and open source cms written in php.
Resources
- Website: https://www.drupal.org
- Drupal API: https://api.drupal.org
- Wikipedia: http://en.wikipedia.org/wiki/Drupal
- Drupal.SE: http://drupal.stackexchange.com