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The name came from the now-defunct Web site, whose code slowly evolved into Drupal.Buytaert wanted to call the site "dorp" (Dutch for "village") for its community aspects, but mistyped it when checking the domain name and thought the error sounded better. Dean Space used open-source sharing of Drupal to support a decentralized network of approximately 50 disparate, unofficial pro-Dean websites that allowed users to communicate directly with one another as well as with the campaign.Drupal themes use standardized formats that may be generated by common third-party theme design engines.Many are written in the PHPTemplate engine Some templates use hard-coded PHP.On October 15, 2014, a sql injection vulnerability was announced and update released.Thus, it can be extremely important to apply these updates quickly and usage of a tool to make this process easier like drush is highly recommended.
Before updating it is highly recommended to take backup of core, modules, theme, files and database.(Starting with version 8, core is kept in its own 'core' sub-directory.) Drupal core is the stock element of Drupal.Bootstrap and Common libraries are defined as Drupal core and all other functionality is defined as Drupal modules including the system module itself.The Drupal theming system utilizes a template engine to further separate HTML/CSS from PHP.
A popular Drupal contributed module called 'Devel' provides GUI information to developers and themers about the page build.
Drupal 7 started the adoption of WAI-ARIA support for Rich Internet Applications and this has been carried further in Drupal 8.