/** * Render a hidden element for empty/unchecked value * * @param MultiCheckboxElement $element * @param array $attributes * @return string */ protected function renderHiddenElement(MultiCheckboxElement $element, array $attributes) { $closingBracket = $this->getInlineClosingBracket(); $uncheckedValue = $element->getUncheckedValue() ? $element->getUncheckedValue() : $this->uncheckedValue; $hiddenAttributes = array('name' => $element->getName(), 'value' => $uncheckedValue); return sprintf('<input type="hidden" %s%s', $this->createAttributesString($hiddenAttributes), $closingBracket); }