Setup CodeIgniter

Look the step below:
1. Place the extracted files on htdocs directory
2. Create .htaccess file and place it on CodeIgniter directory

  RewriteEngine on

  RewriteCond $1 !^(index\.php|images|robots\.txt|user_guide/*/*)

  RewriteRule ^(.*)$ /ci/index.php/$1 [L]
3. Set your database setting in application/database.php to

  $db['default']['username'] = 'your username here';

  $db['default']['password'] = 'your password here';

  $db['default']['database'] = 'your database here';
4. Open application/autoload.php
  $autoload['libraries'] = array('database');
   

Setup CodeIgniter