PHP/native/BackedEnum

BackedEnum pseudointerface manual page: The BackedEnum interface

Note that this (pseudo)interface cannot actually be implemented as a standard class; it can only be (pseudo)implemented by declaring a backed enum.

Definition

interface BackedEnum extends UnitEnum {

   static from(int|string $value): static;
   static tryFrom(int|string $value): ?static;

   string|int $value; // pseudocode

   // OVERRIDEs UnitEnum::cases()
   static cases(): array;

   // INHERITED from UnitEnum (unmodified):
   string $name; // pseudocode
}

The member-variables are labelled "pseudocode" because a normal interface can't declare member-variables.

cases()

This method returns an array containing one element for each case in the enum:

• <array index> (int) => <enum case-object> (BackedEnum)

This list can then be used to build other arrays indexing the enum class's names, values, or calculated values.