A beautiful error page on WordPress with spatie/laravel-ignition

composer require spatie/laravel-ignition

<?php

/**
 * Do not edit this file. Edit the config files found in the config/ dir instead.
 * This file is required in the root directory so WordPress can find it.
 * WP is hardcoded to look in its own directory or one directory up for wp-config.php.
 */

use Spatie\Ignition\Ignition;

require_once(dirname(__DIR__) . '/vendor/autoload.php');
require_once(dirname(__DIR__) . '/config/application.php');
require_once(ABSPATH . 'wp-settings.php');


// Initialize Ignition if in the development environment
if (defined('WP_ENV') && WP_ENV !== 'production' && !defined('WP_CLI')) {
	// Initialize Ignition
	$ignition = Ignition::make()
		->registerMiddleware([
			function ($report, $next) {
				$report->group('WordPress Info', [
					'Version' => get_bloginfo('version'),
					'Theme' => wp_get_theme()->get('Name'),
				]);
				return $next($report);
			}
		])
		->setTheme('dark')
		->applicationPath(dirname(__DIR__)) // Set to project root
		->shouldDisplayException(true);

	// Register Ignition
	$ignition->register();

	ob_start();

	register_shutdown_function(function () use ($ignition) {
		$error = error_get_last();
		if ($error !== null && in_array($error['type'], [E_ERROR, E_CORE_ERROR, E_COMPILE_ERROR, E_PARSE])) {
			$exception = new \ErrorException(
				$error['message'],
				0,
				$error['type'],
				$error['file'],
				$error['line']
			);

			// Clear all previous output
			while (ob_get_level() > 0) {
				ob_end_clean();
			}

			// Display Ignition's error page
			if (class_exists(Ignition::class)) {
				$ignition->handleException($exception);
			} else {
				echo '<pre>';
				print_r($exception);
				echo '</pre>';
			}

			exit; // Stop further execution

			// Flush output buffer if no error occurred
			ob_end_flush();
		}
	});

	set_exception_handler(function (\Throwable $e) use ($ignition) {
		// Clear output buffer to prevent partial rendering
		while (ob_get_level() > 0) {
			ob_end_clean();
		}

		// Display Ignition's error page
		if (class_exists(Ignition::class)) {
			$ignition->handleException($e);
		} else {
			echo '<pre>';
			print_r($e);
			echo '</pre>';
		}

		exit; // Prevent further execution
	});

	add_action('wp', function () use ($ignition) {
		add_action('template_redirect', function () use ($ignition) {
			$error = error_get_last();
			if ($error !== null) {
				// Convert WordPress errors to exceptions
				$exception = new \ErrorException(
					$error['message'],
					0,
					$error['type'],
					$error['file'],
					$error['line']
				);

				// Clear all output and handle with Ignition
				while (ob_get_level() > 0) {
					ob_end_clean();
				}

				if (class_exists(Ignition::class)) {
					$ignition->handleException($exception);
				} else {
					echo '<pre>';
					print_r($exception);
					echo '</pre>';
				}

				exit;
			}
		});
	});
}

Config::define('QM_DISABLE_ERROR_HANDLER', true);