3.0 Roadmap

This outlines the development roadmap of the 3.0 major release.

Bump PHP Minimum Requirement

• Bump PHP mimium requirement to PHP 8.1
• Make use of PHP language features up to PHP 8.1
  • PHP 5.4.0
    • Shortened array syntax
    • Traits
    • Array dereferencing support
    • Callable typehint
    • Class member access on instantiation (e.g. (new foo)->bar()) support
  • PHP 5.5.0
    • Generators
    • Support of finally keyword
    • Scalar class name resolution via ::class
  • PHP 5.6.0
    • Constant scalar expressions
    • Variadic functions and argument unpacking using the ... operator
    • Function and constant importing with the use keyword.
  • PHP 7.0.0
    • Improved Exception hierarchy
    • The null coalescing operator (??)
    • Return and Scalar Type Declarations
    • Anonymous classes
  • PHP 7.1.0
    • Nullable types
    • Void return type
    • Iterable pseudo-type
    • Class constant visiblity modifiers
    • Square bracket syntax for list() and the ability to specify keys in list()
    • Catching multiple exceptions types
  • PHP 7.2.0 / PHP 7.3: What's New and Changed
    • Object typehint
    • Allow trailing comma in function and method calls
  • PHP 7.4.0 / PHP 7.4: What's New and Changed
    • Typed Properties
    • Arrow Functions
    • Limited Return Type Covariance and Argument Type Contravariance
    • Unpacking Inside Arrays
  • PHP 8.0.0 / PHP 8.0: What's New and Changed
    • Union Types
    • Named Arguments
    • Match Expressions
    • Attributes
    • Constructor Property Promotion
    • Nullsafe Operator
  • PHP 8.1.0 / PHP 8.1: What's New and Changed
    • Enumerations
    • Readonly properties
    • Pure Intersection Types
    • final modifier for class constants
• Upgrade dependencies & sub dependencies
  • PHP Depend to 3.0
  • PHPUnit to 10.5
  • composer/xdebug-handler to 3.0