core-bundle/src/Resources/contao/widgets/OptionWizard.php
public function validate()
	{
		$mandatory = $this->mandatory;
		$options = $this->getPost($this->strName);

		// Check labels only (values can be empty)
		if (\is_array($options))
		{
			foreach ($options as $key=>$option)
			{
				// Unset empty rows
				if ($option['label'] == '')
				{
					unset($options[$key]);
					continue;
				}

				$options[$key]['label'] = trim($option['label']);
				$options[$key]['value'] = trim($option['value']);

				if ($options[$key]['label'] != '')
				{
					$this->mandatory = false;
				}

				// Strip double quotes (see #6919)
				if ($options[$key]['value'] != '')
				{
					$options[$key]['value'] = str_replace('"', '', $options[$key]['value']);
				}
			}
		}

		$options = array_values($options);
		$varInput = $this->validator($options);

		if (!$this->hasErrors())
		{
			$this->varValue = $varInput;
		}

		// Reset the property
		if ($mandatory)
		{
			$this->mandatory = true;
		}
	}
public function validate()
	{
		$mandatory = $this->mandatory;
		$options = $this->getPost($this->strName);

		// Check labels only (values can be empty)
		if (\is_array($options))
		{
			foreach ($options as $key=>$option)
			{
				// Unset empty rows
				if ($option['label'] == '')
				{
					unset($options[$key]);
					continue;
				}

				$options[$key]['label'] = trim($option['label']);
				$options[$key]['value'] = trim($option['value']);

				if ($options[$key]['label'] != '')
				{
					$this->mandatory = false;
				}

				// Strip double quotes (see #6919)
				if ($options[$key]['value'] != '')
				{
					$options[$key]['value'] = str_replace('"', '', $options[$key]['value']);
				}
			}
		}

		$options = array_values($options);
		$varInput = $this->validator($options);

		if (!$this->hasErrors())
		{
			$this->varValue = $varInput;
		}

		// Reset the property
		if ($mandatory)
		{
			$this->mandatory = true;
		}
	}
Validate the input and set the value