What are the recommended standards or guidelines for maintaining consistent character encoding across different PHP files to ensure proper session handling?

In order to maintain consistent character encoding across different PHP files for proper session handling, it is recommended to set the default character encoding to UTF-8 in all PHP files. This ensures that data is stored and retrieved in a consistent manner, preventing encoding-related issues within sessions.

// Set default character encoding to UTF-8
ini_set('default_charset', 'UTF-8');