FluidTYPO3\Vhs\ViewHelpers\Form\SelectViewHelper::render PHP Метод

    public function render()
    {
        $name = $this->getName();
        if (true === (bool) $this->arguments['multiple']) {
            $name .= '[]';
        }
        $this->tag->addAttribute('name', $name);
        if (true === isset($this->arguments['options']) && false === empty($this->arguments['options'])) {
            $options = $this->getOptions();
            if (true === empty($options)) {
                $options = ['' => ''];
            }
            $this->tag->setContent($this->renderOptionTags($options));
        } else {
            $this->viewHelperVariableContainer->add(SelectViewHelper::class, 'options', []);
            $this->viewHelperVariableContainer->add(SelectViewHelper::class, 'value', $this->getValue());
            $tagContent = $this->renderChildren();
            $options = $this->viewHelperVariableContainer->get(SelectViewHelper::class, 'options');
            $this->tag->setContent($tagContent);
            $this->viewHelperVariableContainer->remove(SelectViewHelper::class, 'options');
            if (true === $this->viewHelperVariableContainer->exists(SelectViewHelper::class, 'value')) {
                $this->viewHelperVariableContainer->remove(SelectViewHelper::class, 'value');
            }
        }
        $this->setErrorClassAttribute();
        $content = '';
        // register field name for token generation.
        // in case it is a multi-select, we need to register the field name
        // as often as there are elements in the box
        if (true === (bool) $this->arguments['multiple']) {
            $content .= $this->renderHiddenFieldForEmptyValue();
            $length = count($options);
            for ($i = 0; $i < $length; $i++) {
                $this->registerFieldNameForFormTokenGeneration($name);
            }
            $this->tag->addAttribute('multiple', 'multiple');
        } else {
            $this->registerFieldNameForFormTokenGeneration($name);
            $this->tag->removeAttribute('multiple');
        }
        $content .= $this->tag->render();
        return $content;
    }