Convert DateTime to String PHP

You can use the format method of the DateTime class:

$date = new DateTime('2000-01-01');
$result = $date->format('Y-m-d H:i:s');

If format fails for some reason, it will return FALSE. In some applications, it might make sense to handle the failing case:

if ($result) {
  echo $result;
} else { // format failed
  echo "Unknown Time";
}