php8之enum配合match的使用:

// 定义了如下enum类，用于获取 suffix
enum RegistrationSuffix: string
{
    case Early = 'early';
    case Late = 'late';
    case Regular = 'regular';

    public static function getSuffix(?string $suffix): self
    {
        return match ($suffix) {//使用 match 表达式（PHP 8.0+）来实现选择逻辑
            'Early bird' => self::Early,
            'Late'       => self::Late,
            default      => self::Regular,
        };
    }
}

// 使用
$suffix = RegistrationSuffix::getSuffix('Early bird');
var_dump($suffix); // enum(RegistrationSuffix::Early)

$suffixValue = RegistrationSuffix::getSuffix('Early bird')->value;
echo $suffixValue; // 输出 "early"