PHP Manual: Changes to INI file handling

PHP Manual
Appendices
Migrating from PHP 5.4.x to PHP 5.5.x
What has changed in PHP 5.5.x
Backward Incompatible Changes
New features
Deprecated features in PHP 5.5.x
Changed Functions
New Functions
New Classes and Interfaces
New Methods
Other changes to extensions
New Global Constants
Changes to INI file handling
Changes to PHP Internals

Changes to INI file handling

Intl

The intl.use_exceptions configuration directive has been added, which controls the behaviour of intl when global errors occur in conjunction with the already extant intl.error_level configuration directive.

MySQLnd

The mysqlnd.sha256_server_public_key configuration directive has been added to allow mysqli to use the new MySQL authentication protocol.