Codeigniter installation & setup: Codeigniter Club

               

Windows Environment 
 Install XAMPP or WAMP 
 Download and Unzip the package from Codeigniter.com 
 Extract all the documents in the server space (htdocs or www directory)
Linux Environment 
Download and Unzip the package from Codeigniter.com 
Place the extracted folder in /var/www (in WAMP) or xampp/htdocs (XAMPP)
Base URL 
Go to application/config/config.php 
Define base URL as $config['base_url'] = 'http://localhost/path/to/folder';
How to remove index.php from URL?
go to root 
create htaccess file 
Add below code inside it 

RewriteEngine on 
RewriteCond $1 !^(index\.php|assets|image|resources|robots\.txt) 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteRule ^(.*)$ index.php/$1 [L,QSA] 

Note: .htaccess code varies depending on the hosting server. Some hosting servers (e.g.: Godaddy) need to use an extra? in the last line of the above code. The following line will be replaced with the last line in applicable case: 

RewriteRule ^(.*)$ index.php?/$1 [L,QSA]

Nginx Configuration

Open nginx config file (by default: /etc/nginx/sites-available/default) 
Add below code inside it.

server { 
     server_name domain.tld;

     root /path-to-codeigniter-folder; //you codeigniter path 
     index index.html index.php;

     # set expiration of assets to MAX for caching 

     location ~* \.(ico|css|js|gif|jpe?g|png)(\?[0-9]+)?$ { 
         expires max; 
         log_not_found off; 
     }
     location / { 
     # Check if a file or directory index file exists, else route it to index.php.
     try_files $uri $uri/ /index.php; 
     } 
     location ~* \.php$ 
    { 
     fastcgi_pass 127.0.0.1:9000; 
     include fastcgi.conf; 
     } 
} 

Database Configuration
Go to application/config/database.php 
Set the following configuration variables.
Host  
Username 
Password 
Database Name 
Port 
Set Default Controller
Go to application/config/routes.php 
set the following configuration variable value with your controller name. (default_controller)
AutoLoad Library And Helper
Go to application/config/autoload.php 
set Auto load value like $autoload['libraries'] = array('database', 'session'); 
set Helper value like $autoload['helper'] = array('url', 'file', 'form', 'html', 'text');