Firestore database name customization is not impented.

[Geolim4]

Thanks for stopping by to let us know something could be better!

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Is your feature request related to a problem? Please describe.
Currently, the php-sdk does not allow us to set a custom database name because it is hardcoded in the constructor (still in 1.39):

    public function __construct(array $config = [])
    {
        $emulatorHost = getenv('FIRESTORE_EMULATOR_HOST');

        $this->requireGrpc();
        $config += [
            'returnInt64AsObject' => false,
            'scopes' => [self::FULL_CONTROL_SCOPE],
            'database' => self::DEFAULT_DATABASE,
            'hasEmulator' => (bool) $emulatorHost,
            'emulatorHost' => $emulatorHost,
        ];

        $this->database = $config['database'];

        $this->connection = new Grpc($this->configureAuthentication($config) + [
            'projectId' => $this->projectId,
        ]);

        $this->valueMapper = new ValueMapper(
            $this->connection,
            $config['returnInt64AsObject']
        );
    }

Describe the solution you'd like
It would be nice to have the hability to change the database name, in case the administrator changed it in GCP:

The change is pretty simple:

    public function __construct(array $config = [])
    {
        $emulatorHost = getenv('FIRESTORE_EMULATOR_HOST');

        $this->requireGrpc();
        $config += [
            'returnInt64AsObject' => false,
            'scopes' => [self::FULL_CONTROL_SCOPE],
            'database' => $config['database'] ?? self::DEFAULT_DATABASE, // <========= This little change
            'hasEmulator' => (bool) $emulatorHost,
            'emulatorHost' => $emulatorHost,
        ];

        $this->database = $config['database'];

        $this->connection = new Grpc($this->configureAuthentication($config) + [
            'projectId' => $this->projectId,
        ]);

        $this->valueMapper = new ValueMapper(
            $this->connection,
            $config['returnInt64AsObject']
        );
    }

(plus Phpdoc updated obviously).

Describe alternatives you've considered
N/A

Additional context
Add any other context or screenshots about the feature request here.

[bshaffer]

@Geolim4 Hi there! Thanks for reporting this. So because the $config variable is using +=, this allows you to supply a database parameter to override the default:

$config = ['database' => 'mydatabase'];
$config += ['database' => 'DEFAULT'];
var_dump($config);
// array(1) { ["database"]=>string(10) "mydatabase" }

So, the functionality you want already exists, we just don't have the parameter documented in PHPDoc.

[Geolim4]

Hello, for some reason when I passed it to the constructor the database stood on "(default)", I'll investigate this behavior on my side. Have a nice day !