What are the best practices for handling PHP code formatting across multiple files?

When working with PHP code spread across multiple files, it's important to maintain consistent formatting for readability and maintainability. One way to achieve this is by using a code formatting tool like PHP-CS-Fixer, which can automatically standardize the formatting of your PHP files based on a predefined set of rules.

// Example PHP code snippet using PHP-CS-Fixer to format code across multiple files
// Install PHP-CS-Fixer using Composer
// composer require friendsofphp/php-cs-fixer

// Run PHP-CS-Fixer on a directory containing PHP files to standardize formatting
// php vendor/bin/php-cs-fixer fix /path/to/directory