It is very easy to install CodeIgniter. Just follow the steps below −
Step-1 − Download the CodeIgniter from the link CodeIgniter (https://codeigniter.com/download)
Step-2 − Unzip the folder.
Step-3 − Upload all files and folders to your server.
Step-4 − After uploading all the files to your server, visit the URL of your server, e.g., www.domain-name.com.
On visiting the URL, you will see the following screen −