What best practices should be followed when sharing PHP functions across multiple servers?

When sharing PHP functions across multiple servers, it is essential to ensure that the functions are easily accessible and consistent across all servers. One best practice is to create a centralized location for storing the functions, such as a shared folder or a separate PHP file, and include this file in all servers that need to use the functions. This way, any updates or changes to the functions can be made in one place and will automatically reflect on all servers.

// Include the shared functions file in your PHP scripts on all servers
include_once('/path/to/shared/functions.php');