user_guide_src/source/general/creating_drivers.rst

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Creating Drivers
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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()