New Classes and Interfaces
Other changes to extensions
Migrating from PHP 5.4.x to PHP 5.5.x
在线手册：
中文
英文
PHP手册
New Methods
MySQLi
mysqli::begin_transaction()
mysqli::release_savepoint()
mysqli::savepoint()
Intl
IntlDateFormatter::formatObject()
IntlDateFormatter::getCalendarObject()
IntlDateFormatter::getTimeZone()
IntlDateFormatter::setTimeZone()
New Classes and Interfaces
Other changes to extensions
Migrating from PHP 5.4.x to PHP 5.5.x
在线手册：
中文
英文
PHP手册