CodeIgniter Step By Step Tutorial: After understand about codeIgniter at this, now, we learn how to install CodeIgniter. We will install to our local computer. Before follow this instruction, please download CodeIgniter at www.codeigniter.com.
Open your root web server.
Put CodeIgniter downloaded.
Extract it, you will get a folder named "codeigniter_[version]".
For simple, rename the folder to be "CodeIgniter" only.
Now, open config.php within CodeIgniter\system\application\config.
Change base site url at line 14:
Point your browser to http://localhost/CodeIgniter.