return today's midnight timestamp

get midnight

function getMidnight(){
  $date = new DateTime();
	$hours =  $date->format('H');
	$minutes =  $date->format('i');
	$seconds =  $date->format('s');

	$hours = ($hours*60)*60;
	$minutes  = $minutes*60;
	$midnight = time()-($hours+$minutes+$seconds);
	$midnight = $date = date('Y-m-d H-i-s', $midnight);

	return $midnight;
}