[12.x] Support enums as driver in Illuminate\Support\Manager

[hosni]

This PR adds support for using PHP enums (UnitEnum and BackedEnum) as driver identifiers in Illuminate\Support\Manager.

Managers can now accept enums in driver(), extend(), and getDefaultDriver(). Driver names are normalized via enum_value(), while internal caching and resolution continue to operate on strings.

This applies to all managers extending Illuminate\Support\Manager, including:

• Illuminate\Foundation\MaintenanceModeManager
• Illuminate\Hashing\HashManager
• Illuminate\Notifications\ChannelManager
• Illuminate\Session\SessionManager

Example:

use Illuminate\Support\Facades\Session;

enum SessionDriver: string
{
    case Database = 'database';
}

Session::driver(CacheDriver::Redis)->put('key', 'value');

BC

• No breaking changes
• Existing string-based usage unchanged
• Driver caching and extension behavior preserved

Integration tests added for enum defaults, enum extensions, mixed enum and string drivers, and caching behavior.

[taylorotwell]

Don't make a resolveDriverName method

[hosni]

Don't make a resolveDriverName method

Done. I’ve removed the resolveDriverName method and inlined enum_value() where needed.

[taylorotwell]

I think you would also need to update MultipleInstanceManager.

[hosni]

I think you would also need to update MultipleInstanceManager.

Sure, I’ll update MultipleInstanceManager as well.