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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | # Request Flow
Every application follows the same flow:
1. Application starts from `index.php`.
1. The application, module, and system paths are set. (`APPPATH`, `MODPATH`, and `SYSPATH`)
2. Error reporting levels are set.
3. Install file is loaded, if it exists.
4. The [Kohana] class is loaded.
5. The bootstrap file, `APPPATH/bootstrap.php`, is included.
2. Once we are in `bootstrap.php`:
7. [Kohana::init] is called, which sets up error handling, caching, and logging.
8. [Kohana_Config] readers and [Kohana_Log] writers are attached.
9. [Kohana::modules] is called to enable additional modules.
* Module paths are added to the [cascading filesystem](files).
* Includes each module's `init.php` file, if it exists.
* The `init.php` file can perform additional environment setup, including adding routes.
10. [Route::set] is called multiple times to define the [application routes](routing).
11. [Request::instance] is called to start processing the request.
1. Checks each route that has been set until a match is found.
2. Creates the controller instance and passes the request to it.
3. Calls the [Controller::before] method.
4. Calls the controller action, which generates the request response.
5. Calls the [Controller::after] method.
* The above 5 steps can be repeated multiple times when using [HMVC sub-requests](requests).
3. Application flow returns to index.php
12. The main [Request] response is displayed
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