New functions
New Global Constants
Migrating from PHP 5.6.x to PHP 7.0.x
PHP Manual
New Classes and Interfaces
Intl
IntlChar
Reflection
ReflectionGenerator
ReflectionType
Session Handling
SessionUpdateTimestampHandlerInterface
Exception Hierarchy
Throwable
Error
TypeError
ParseError
AssertionError
ArithmeticError
DivisionByZeroError
New functions
New Global Constants
Migrating from PHP 5.6.x to PHP 7.0.x
PHP Manual