/**
* Check if cell is a date
* @param integer $index
* @return boolean
*/
protected function cellIsDate($index)
{
// if is a date or if is a date column
if ($this->reader->getDateColumns()) {
return in_array($index, $this->reader->getDateColumns());
} else {
return PHPExcel_Shared_Date::isDateTime($this->cell);
}
}
