What steps can be taken to troubleshoot discrepancies in form validation functionality between local and live server environments in PHP?

When troubleshooting discrepancies in form validation functionality between local and live server environments in PHP, ensure that the server configurations are consistent, including PHP version, extensions, and settings. Check for any differences in file paths or directory structures that may affect the validation process. Additionally, review the code for any hard-coded server-specific values that may need to be adjusted for each environment.

// Example code snippet for adjusting file paths for form validation between local and live server environments
// Define base URL for the website
if ($_SERVER['HTTP_HOST'] == 'localhost') {
    define('BASE_URL', 'http://localhost/project/');
} else {
    define('BASE_URL', 'https://www.example.com/');
}

// Use the BASE_URL constant in form validation scripts
require_once(BASE_URL . 'validation_functions.php');