Drupal (/ˈdruːpəl/) is a free and open-source web content management system (CMS) written in PHP and distributed under the GNU General Public License. ... The standard release of Drupal, known as Drupal core, contains basic features common to content-management systems.

Is Drupal using PHP?

Drupal's Composer-based dependencies are packaged using PHP 5.5. 9. If you are using a higher PHP version, you might benefit from issuing a composer update command to get more appropriate versions of Composer-based dependencies.

Do I need to learn PHP for Drupal?

Drupal and many other popular web applications are written in PHP. If you wish to develop Drupal modules or be able to do advanced Drupal theming, you will need to learn PHP.