# CodeIgniter User Guide Version 2.2.3

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# Creating Drivers

## Driver Directory and File Structure

Sample driver directory and file structure layout:

- /application/libraries/Driver_name
  - Driver_name.php
  - drivers
    - Driver_name_subclass_1.php
    - Driver_name_subclass_2.php
    - Driver_name_subclass_3.php

NOTE: In order to maintain compatibility on case-sensitive file systems, the `Driver_name` directory must be ucfirst()