PHPで列挙型(enum)を作る - Qiita<?php abstract class Enum { private $scalar; public function __construct($value) { $ref = new ReflectionObject($this); $consts = $ref->getConstants(); if (! in_array($value, $consts, true)) { throw new InvalidArgumentException; } $this->scalar = $value; } final public static function __callStatic($label, $args) { $class = get_called_class(); $const = constant("$class::$label"); return new $class($
