Migrating from PHP 5.4.x to PHP 5.5.x
PHP Manual

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.


Migrating from PHP 5.4.x to PHP 5.5.x
PHP Manual