I want to get the value of an Enum in PHP by its name. My enum is like:

enum Status : int
{
    case ACTIVE = 1;
    case REVIEWED = 2;
    // ...
}

Status::from(2) can be used to get "REVIEWED", but how can I resolve the value from the name stored in a string ?

CodePudding user response：

To get value from the name:

enum Status : int
{
   case ACTIVE = 1;
   case REVIEWED = 2;
   // ...
}

print(Status::REVIEWED->value);

Enum documentation

CodePudding user response：

Well, it seems there is not any built-in solution in PHP. I've solve this with a custom function:

enum Status : int
{
    case ACTIVE = 1;
    case REVIEWED = 2;
    // ...

    public static function fromName(string $name): string
    {
        foreach (self::cases() as $status) {
            if( $name === $status->name ){
                return $status->value;
            }
        }
        throw new \ValueError("$name is not a valid backing value for enum " . self::class );
    }

}

Then, I simply use Status::fromName('ACTIVE') and get 1

If you want to mimic the from and tryFrom enum functions, you can also add:

public static function tryFromName(string $name): string|null
{
    try {
        return self::fromName($name);
    } catch (\ValueError $error) {
        return null;
    }
}