In topic: http://www.phpdocx.com/en/forum/default/post/4053
if text = 0, then table half-empty. Example:
$textFragment = new WordFragment($options['docx']);
  $text = array();
  $text[] =
    array(
      'text' => 'centered text',
      'underline' => 'single'
    );
  $paragraphOptions = array(
    'textAlign' => 'center',
  );
  $textFragment->addText($text, $paragraphOptions);
  $valuesTable = array(
    array(
      $textFragment,
    ),
    array(
      'Other text',
    ),
    array(
      'Other text',
    ),
  );if replace 'text' => 'centered text' on 'text' => '0', then table clear cell value