<?php
  protected function _createDataRows(array $rows)
  {
    $result = [];
    foreach ($rows as $row) {
      $str = '';
      foreach ($row as $val) {
        if (!empty($str)) {
          $str .= "|";
        }
        $str .= str_replace(array("\n", "\r"), '', nl2br($val) );
      }
      $result[] = $str;
    }
    return implode("\n", $result);
  }