PHP/enum

PHP enum support

Examples

"Basic" enum	"Backed" enum
enum Suit { case Hearts; case Diamonds; case Clubs; case Spades; }	enum Suit: string { case Hearts = 'H'; case Diamonds = 'D'; case Clubs = 'C'; case Spades = 'S'; }

Methods

kind of thing	name & args	returns	defined in	description
static function	cases()	array	UnitEnum
static function	tryFrom(int|string $value)	?static	BackedEnum	same as from(), but returns NULL if not found (instead of erroring)
static function	from(int|string $value)	static	BackedEnum	same as tryFrom, but throws an error if not found
dynamic property	$name	string	UnitEnum	the name of the case (case-sensitive)
dynamic property	$value	int or string	BackedEnum	the value of the case

Documentation

Note that enums can be cast directly to arrays.

• Enumerations:
  • variable type
  • Enumerations language reference
    • "Basic" enums
    • "Backed" enums
• Classoids:
  • UnitEnum
  • BackedEnum

3rd party

• stitcher.io

Sample Code

To get a UnitEnum enum from a case name (equivalent to from()/tryFrom()):

• constant("<enum name>::{$value}")

Tests

• is an enum an object (is_object)? [YES]
• is an enum seen as is_a UnitEnum? [YES]
• is an enum an instanceof UnitEnum? [YES]
• is an enum an instanceof enum? [no]