What is the CLI? Why we use CLI in Codeigniter?

CLI is a text-based command-line interface for interacting with computers via a set of commands.

In Codeigniter, we can use CLI for

• Run your cronjobs without needing to use wget or curl
• Make your cron-jobs inaccessible from being loaded in the URL by checking the return value of is_cli().
• Make interactive “tasks” that can do things like set permissions, prune cache folders, run backups, etc.
• Helps to integrate Codeigniter with other applications in other languages. For example, a random C++ script could call one command and run code in your models!