Convert Symfony Form to text values

SymfonyFormTransformer.php

<?php 
class SymfonyFormTransformer {
    /**
     * @param FormInterface $form
     * @return string
     */
    public function transformFormToText(FormInterface $form)
    {
        $txt = '';
        foreach ($form->getData() as $inputName => $inputValue) {
            $formElement = $form->get($inputName);
            if (!$formElement) {
                continue;
            }
            $formElementConfig = $formElement->getConfig();
            $formElementLabel = $formElementConfig->getOption('label');
            if (!$formElementConfig->hasOption('choices')) {
                $txt = $this->appendValue($txt, $formElementLabel, $inputValue);
                continue;
            }
            $formElementChoices = $formElementConfig->getOption('choices');
            $formElementChoices = is_bool(reset($formElementChoices)) ?: array_flip($formElementChoices);
            if (!is_array($inputValue)) {
                $choice = is_bool($inputValue) ?: $formElementChoices[$inputValue];
                $txt = $this->appendValue(
                    $txt,
                    $formElementLabel,
                    (is_bool($choice) ? ($choice ? 'Yes' : 'No') : $choice)
                );
                continue;
            }
            foreach ($inputValue as $selectedChoice) {
                $txt = $this->appendValue($txt, $formElementLabel, $formElementChoices[$selectedChoice]);
            }
        }
        return $txt;
    }
    /**
     * @param string $txt
     * @param string $label
     * @param string $value
     * @return string
     */
    private function appendValue($txt, $label, $value)
    {
        return $txt.$label.': "'.$value."\"\n";
    }
}