'No' does not mean never, only not now !!!.
CodeIgniter is a lightweight Framework (Released in 2006). CodeIgniter is very easy to install, within half an hour you can run your program by CodeIgniter. It works nicely on almost all Shared and Dedicated hosting Platforms.Currently required PHP version is 22.214.171.124
PHP version 7.0.15 or newer is required, with intl extension installed.
Database is required in almost all web application, for the CI4 the database requirement is: