DPC2021: PHP Enums - Ayesh Karunaratne

Php

PHP Enums: Discover the new type in PHP 8.1, introducing a more restrictive and modern way to define constants and improve code maintainability and readability.

Key takeaways

Enums are a type in PHP 8.1, similar to classes, but with limitations.
Enums cannot have properties, they are readonly and cannot be extended.
Enums implement an interface called UnitEnum.
Enums have a fixed number of members and their values are contained within the class.
Enums can be used as property types or as return types for methods.
Enums have a unique syntax in PHP, using the enum keyword.
Enums support static methods, but not static properties.
Enums are not meant to be used with floats, boolean values, or class constants.
Enums are used with unit enums and backed enums, with unit enums being the default.
Enum members are readonly and cannot be added or removed.
Enums are a type, but they are not a class, and they do not support inheritance.
Enums are used to define a fixed set of constants.
Enums can be used in conjunction with type hints in method declarations.
Enums can be used with JSON data and APIs.
Enums can be used to create more readable and maintainable code.
Enums are meant to be used with a fixed set of values.
Enums are a more restrictive version of classes, with limitations.
Enums are not meant to be used with dynamic properties or methods.
Enums can be used to define type-safe constants.
Enums can be used with IDEs and autocompletion.
Enums have a syntax similar to classes, but with some differences.
Enums are a more modern way of defining constants.
Enums can be used in conjunction with type-safe code.
Enums are meant to be used with a fixed set of states or conditions.
Enums can be used to create more robust and maintainable code.
Enums can be used with discrete values.

DPC2021: PHP Enums - Ayesh Karunaratne

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