Getting start with CI 2.x OR 3.x

Rufnex is correct, go with 3.0 now.

The only reason to use version 2.x is if you are supporting existing code written to that version.

The word on 3.0 is "real soon now".  Which is not today but certainly very close.

I've been using 3.0 since it was Alpha release.  It is now late Beta release and I find no problems.

CI 3.1 Kubuntu 19.04 Apache 5.x  Mysql 5.x PHP 5.x PHP 7.x
Remember: Obfuscation is a bad thing.
Clarity is desirable over Brevity every time.