The functions.php file of my Child Theme is a mess...
I'd like to use classes in a separate folder (like /inc) but I would like to keep a maximum of security.
For now everything works as excepted, but is my code safe enough to use in production ?

• functions.php

  // Include our classes.  
  require_once( get_stylesheet_directory() . '/inc/class.my-class-1.php' );  
  require_once( get_stylesheet_directory() . '/inc/class.my-class-2.php' );  
  ...  
  
  // Instantiate our classes.  
  $my_class_1 = new My_Class_1();  
  $my_class_2 = new My_Class_2();  
  
  // Hooks goes here.  
  add_action( 'hook_i_want', array( $my_class_1, 'my_function_in_class_1'), 10 );  
  add_filter( 'other_hook_i_want', array( $my_class_2, 'my_function_in_class_2' ) );  
  ...
  

Or maybe a better idea ?