createCaptchaCode example

class BasicCaptchaGenerator extends AbstractBasicCaptchaGenerator
{
    private const FALLBACK_WIDTH_IMAGE = 390;
    private const FALLBACK_HEIGHT_IMAGE = 65;

    private string $backgroundPath = __DIR__ . '/../../../Resources/app/storefront/dist/assets/captcha/background.png';

    private string $fontPath = __DIR__ . '/../../../Resources/app/storefront/dist/assets/captcha/font.ttf';

    public function generate(int $length = 7): BasicCaptchaImage
    {
        $code = $this->createCaptchaCode($length);

        $filesystem = new Filesystem();

        if ($filesystem->exists($this->backgroundPath)) {
            /** @var \GdImage $img */
            $img = imagecreatefrompng($this->backgroundPath);
        } else {
            /** @var \GdImage $img */
            $img = imagecreate(self::FALLBACK_WIDTH_IMAGE, self::FALLBACK_HEIGHT_IMAGE);
            imagecolorallocate($img, 255, 255, 255);
        }