What are the common pitfalls when transferring data between different systems, such as an XTC-Shop and a WaWi, in terms of character encoding and data representation?

Common pitfalls when transferring data between different systems include issues with character encoding and data representation. To avoid these problems, it is important to ensure that both systems are using the same character encoding (such as UTF-8) and that data is properly formatted before being transferred.

// Set the character encoding to UTF-8
header('Content-Type: text/html; charset=utf-8');

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