PHP 8.1 RFC: Enumerations

New Feature
PHP 8.1

RFC Vote: Enumerations

>= 2/3
Yes: 44No: 7

An RFC to add Enumerations (Enums for short) to PHP.

Enums are enumerated types that has a fixed number of possible values. This RFC proposes to add an enum_exists function, two new interfaces for int/string-backed enums, and unit enums.

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