How do you test code that uses Locale?

Testing code that uses Locale is essential for ensuring that your application behaves correctly across different languages and regions. Here’s a simple example of how you can implement and test locale-sensitive code in PHP.


        <?php
        // Setting the locale to French
        setlocale(LC_ALL, 'fr_FR');
        
        // Example function that formats a number based on the current locale
        function formatNumber($number) {
            return number_format($number, 2, ',', ' ');
        }
        
        // Testing the function
        echo formatNumber(1234567.89); // Output will be: "1 234 567,89"
        ?>