Now, we'll need to download the latest version of CI (CodeIgniter).
The link to download the latest version is: https://codeigniter.com/download
For better experience download the current version from the download button suggested on the above snap and ignores future and legacy.
Now, follow the below steps:
1 Unzip the package downloaded from the upper link.
2 Upload the CodeIgniter folders and files to your server. One thing to remember that the index.php file will be at your root.
3Open the URL of your website as www.your-website-name.com and see the following screen.
If you are working with a local server then open the folder in which you saved the above code for example http://localhost/ci/
Here ci is the folder that contains the index.php file.
In these easy steps, you will be able to install CodeIgniter.