### Install TwoFactorAuth with Composer

Source: https://robthree.github.io/TwoFactorAuth/getting-started.html/index

Install the TwoFactorAuth PHP library using Composer. This is the recommended method for integrating the library into your project.

```shell
composer require robthree/twofactorauth

```

--------------------------------

### Create TwoFactorAuth Instance with QR Code Providers

Source: https://robthree.github.io/TwoFactorAuth/getting-started.html/index

Instantiate the TwoFactorAuth class, providing a QR code provider. The constructor requires an object that can generate QR code images. Various providers like BaconQrCodeProvider and EndroidQrCodeProvider are supported, or you can implement your own IQRCodeProvider interface.

```php
use RobThree\Auth\TwoFactorAuth;
use RobThree\Auth\Providers\Qr\BaconQrCodeProvider; // if using Bacon
use RobThree\Auth\Providers\Qr\EndroidQrCodeProvider; // if using Endroid

// using Bacon
$tfa = new TwoFactorAuth(new BaconQrCodeProvider());
// using Endroid
$tfa = new TwoFactorAuth(new EndroidQrCodeProvider());
// using a custom object implementing IQRCodeProvider interface
$tfa = new TwoFactorAuth(new MyQrCodeProvider());
// using named argument and a variable
$tfa = new TwoFactorAuth(qrcodeprovider: $qrGenerator);

```

--------------------------------

### Generate and Display Shared Secret

Source: https://robthree.github.io/TwoFactorAuth/getting-started.html/index

Generate a shared secret for two-factor authentication setup. This secret should be displayed to the user so they can enter it into their authenticator app. It's recommended to store the secret in the session initially until verification is successful.

```php
$secret = $tfa->createSecret();

<p>Please enter the following code in your app: '&lt;?php echo $secret; ?&gt;'</p>

```

--------------------------------

### Verify User Provided Code

Source: https://robthree.github.io/TwoFactorAuth/getting-started.html/index

Verify the code provided by the user against the shared secret. If the verification is successful (returns true), the user has successfully set up their authenticator app. The shared secret can then be securely stored with the user's record.

```php
$result = $tfa->verifyCode($secret, $_POST['verification']);

```

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