What are the best practices for handling character encoding in PHP when transferring data between servers?

When transferring data between servers in PHP, it is important to ensure that character encoding is consistent to avoid issues with special characters or data corruption. One way to handle character encoding is by setting the appropriate encoding for both the source and destination servers using functions like `mb_internal_encoding()` and `mb_http_output()`. Additionally, using functions like `mb_convert_encoding()` can help convert data to the desired character encoding before transferring it between servers.

// Set internal encoding to UTF-8
mb_internal_encoding('UTF-8');

// Set HTTP output encoding to UTF-8
mb_http_output('UTF-8');

// Convert data to UTF-8 before transferring
$data = 'Some data to transfer';
$encoded_data = mb_convert_encoding($data, 'UTF-8');

// Transfer data between servers
// Code for transferring data goes here