Basic Enumerations

Enumerations are a restricting layer on top of classes and class constants, intended to provide a way to define a closed set of possible values for a type.

For a full discussion, see the Enumerations chapter.

Casting

If an enum is converted to an object, it is not modified. If an enum is converted to an array, an array with a single name key (for Pure enums) or an array with both name and value keys (for Backed enums) is created. All other cast types will result in an error.