Setup Codeigniter

CodeIgniter is installed in four steps:

1. Unzip the package.
2. Upload the CodeIgniter folders and files to your server. Normally the index.php file will be at your root.
3. Open the application/config/config.php file with a text editor and set your base URL. If you intend to use encryption or sessions, set your encryption key.
4. If you intend to use a database, open the application/config/database.php file with a text editor and set your database settings.

If you wish to increase security by hiding the location of your CodeIgniter files you can rename the system and application folders to something more private. If you do rename them, you must open your main index.php file and set the $system_folder and $application_folder variables at the top of the file with the new name you've chosen.

For the best security, both the system and any application folders should be placed above web root so that they are not directly accessible via a browser. By default, .htaccess files are included in each folder to help prevent direct access, but it is best to remove them from public access entirely in case the web server configuration changes or doesn't abide by the .htaccess.

After moving them, open your main index.php file and set the $system_folder and $application_folder variables, preferably with a full path, e.g. '/www/MyUser/system'.

One additional measure to take in production environments is to disable PHP error reporting and any other development-only functionality. In CodeIgniter, this can be done by setting the ENVIRONMENT constant, which is more fully described on the security page.

What is codeigniter

Codeigniter is a framework which is mainly focussed on web application development .It is well known for its performance speed.It has inbuilt libraries which helps to build web application faster. Reason behind this is we does not need to follow strict mvc pattern while creating application.We can also able to build with model only view and controllers are enough to built a application.

• Lightweight – Compared to other PHP frameworks CodeIgniter is very lightweight, meaning it is easier to create fast and responsive code
• No Installation – Unlike some PHP frameworks there is no installation required, you just include the CodeIgniter library and off you go
• Large Community – CodeIgniter has a huge active community so you know there are plenty of people willing to help if you get stuck on a particularly difficult problem
• Superb Documentation – CodeIgniter provides excellent documentation with examples
• Flexibility – CodeIgniter allows you to easily extend and expand on its base architecture making it easier to break the mold and produce some really unique web applications