# Settings

> MadelineProto has lots of settings that can be used to modify the behaviour of the library.

MadelineProto has lots of settings that can be used to modify the behaviour of the library.  
These settings are controlled by the following classes in the `\danog\MadelineProto\Settings` namespace:

* [AppInfo: App information.](../PHP/danog/MadelineProto/Settings/AppInfo.html)
* [Auth: Cryptography settings.](../PHP/danog/MadelineProto/Settings/Auth.html)
* [Connection: Connection settings.](../PHP/danog/MadelineProto/Settings/Connection.html)
* [Files: File management settings.](../PHP/danog/MadelineProto/Settings/Files.html)
* [Logger: Logger settings.](../PHP/danog/MadelineProto/Settings/Logger.html)
* [Peer: Peer database settings.](../PHP/danog/MadelineProto/Settings/Peer.html)
* [Pwr: PWRTelegram settings.](../PHP/danog/MadelineProto/Settings/Pwr.html)
* [RPC: RPC settings.](../PHP/danog/MadelineProto/Settings/RPC.html)
* [SecretChats: Secret chat settings.](../PHP/danog/MadelineProto/Settings/SecretChats.html)
* [Serialization: Serialization settings.](../PHP/danog/MadelineProto/Settings/Serialization.html)
* [TLSchema: TL schema settings.](../PHP/danog/MadelineProto/Settings/TLSchema.html)
* [Templates: Web and CLI template settings for login.](../PHP/danog/MadelineProto/Settings/Templates.html)
* [VoIP: VoIP settings.](../PHP/danog/MadelineProto/Settings/VoIP.html)
* [Database\Memory: Memory backend settings.](../PHP/danog/MadelineProto/Settings/Database/Memory.html)
* [Database\Mysql: MySQL backend settings.](../PHP/danog/MadelineProto/Settings/Database/Mysql.html)
* [Database\Postgres: Postgres backend settings.](../PHP/danog/MadelineProto/Settings/Database/Postgres.html)
* [Database\Redis: Redis backend settings.](../PHP/danog/MadelineProto/Settings/Database/Redis.html)

These classes can be instantiated and passed individually to MadelineProto:  
```php
$settings = (new \danog\MadelineProto\Settings\AppInfo)
    ->setApiId(124)
    ->setApiHash('xx');

$API = new \danog\MadelineProto\API('session.madeline', $settings);
```

**It's heavily recommended** to remove (or pass null) the second `$settings` parameter passed to the constructor once the instance is logged in, to avoid the performance overhead of needlessly updating settings every time API is instantiated:  

To modify the settings of an already created instance, `updateSettings` should be used, instead:  
```php
$settings = (new \danog\MadelineProto\Settings\AppInfo)
    ->setApiId(124)
    ->setApiHash('xx');

$MadelineProto->updateSettings($settings);
```

It's recommended you create a separate file that accesses the session just to modify the settings, as it's a very rare operation.  

You can also group settings in a single [\danog\MadelineProto\Settings](../PHP/danog/MadelineProto/Settings.html) object, to quickly modify multiple settings:

**See [here »](../PHP/danog/MadelineProto/Settings.html) for more info on how to get and modify the instances of each subsetting class mentioned at the beginning of this page**.

```php
$settings = new \danog\MadelineProto\Settings;
$settings->setDb((new \danog\MadelineProto\Settings\Database\Mysql)
    ->setUri('tcp://localhost')
    ->setPassword('pass')
);
$settings->setAppInfo((new \danog\MadelineProto\Settings\AppInfo)
    ->setApiId(124)
    ->setApiHash('xx')
);
$settings->getFiles()->setUploadParallelChunks(100);

$MadelineProto->updateSettings($settings);
```

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