Major update to PHP adds support for declaring class, interface, trait, and enum constant types. Readonly properties and randomness also get attention.

PHP 7.1, adds a short form array syntax for unpacking or destructuring an array. PHP 7.1 adds support for class constant visibility, using which constants may be declared public, protected and ...

Besides performance improvements, PHP 8.3 brings a many new features, including amendments to the existing readonly feature; explicitly-typed class constants; a new # [\\Override] attribute, and more.