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
New Functions
New Methods
Migrating from PHP 5.4.x to PHP 5.5.x
PHP Manual
New Classes and Interfaces
cURL
CURLFile
Date and Time
DateTimeImmutable
DateTimeInterface
Intl
IntlCalendar
IntlGregorianCalendar
IntlTimeZone
IntlBreakIterator
IntlRuleBasedBreakIterator
IntlCodePointBreakIterator