Gladius or Gladius DB is a fast and efficient PHP flatfile database engine written in pure PHP;
its SQL syntax is compatible with a subset of intermediate SQL92. You will not need any PHP
extension or any other library to have a full relational database working seamlessy with your
PHP application.
Even if the engine is designed to achieve the best performance, it always runs in an
interpreted language (PHP) and so it has scalability issues. Read the Technical notes for
more.
The author does not consider Gladius DB a professional database engine, if you can use
another free database engine and your PHP installation has the proper extension you should
use that instead.
Gladius DB related links: