What are some lightweight CMS options for PHP that allow for easy customization and extension without excessive code overhead?

When looking for a lightweight CMS option for PHP that allows for easy customization and extension without excessive code overhead, one can consider using options like Pico, Grav, or Bludit. These CMS options are designed to be minimalistic yet flexible, making them ideal for developers who want to build custom websites without the bloat of larger CMS platforms.

// Example code snippet using Pico CMS

// Include Pico's main index file
require_once 'pico/index.php';

// Initialize Pico
(new Pico())->run();