Building a PHP Bootstrap Layer to Handle Config, Errors, and Exceptions

A Bootstrap class serves as a middle layer between a client request and application logic in a PHP OOP project, loading configuration data, request details, and class autoloading before processing begins. The Bootstrap.php file is placed under app/Core/ and is loaded directly into the front controller, index.php, via a require statement. Route detection is handled using PHP's global $_SERVER variable, with hard-coded conditions intentionally triggering errors and exceptions for testing purposes. The front controller registers custom error and exception handlers using set_error_handler() and set_exception_handler() to display diagnostic details when issues arise. This separation ensures the front controller remains free of application logic, delegating all setup responsibilities to the Bootstrap layer.