instructions for CodeIgniter

README.md

@@ -89,7 +89,30 @@ Rollbar::init($config, $set_exception_handler, $set_error_handler);
 
 ### For CodeIgniter Users
 
-If you are using CodeIgniter and wish to report on E_NOTICE level errors you'll have to be sure to run `Rollbar::init` from inside the Controller constructor.
+If you are using CodeIgniter you can place `Rollbar::init` in either of the two places:
+* inside the Controller's constructor
+```php
+	public function __construct()
+	{
+		Rollbar::init(array(
+			'access_token' => config_item('rollbar_access_token'),
+		 	'environment' => ENVIRONMENT
+		));
+		parent::__construct();
+	}
+```
+* `pre_system` hook
+```php
+$hook['pre_system'] = function () {
+    Rollbar::init([
+        'access_token' => config_item('rollbar_access_token'),
+        'environment' => ENVIRONMENT,
+        'root' => APPPATH . '../'
+    ]);
+};
+```
+
+**Note: If you wish to log `E_NOTICE` errors make sure to pass `'included_errno' => E_ALL` to `Rollbar::init`.**
 
 ### For Heroku Users