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<?php namespace App\Localization; enum Locale { case ru; case en; public static function tryFromName(string $name): ?self { $constant = self::class.'::'.$name; if (\defined($constant)) { return \constant($constant); } return null; } public static function fromName(string $name): self { return self::tryFromName($name) ?? throw new \ValueError(sprintf( '"%s" is not a valid name for enum "%s"', $name, self::class, )); } } var_dump(Locale::tryFromName('ru')); var_dump(Locale::tryFromName('fr')); var_dump(Locale::fromName('en')); var_dump(Locale::fromName('es'));