DateTime not inserting into MySql database

Question

I am trying to insert Date and Time into a database, it inserts the Date, but not the Time of the DateTime() function

This is the script in question where it is sent to Last

$timeZone = date_default_timezone_set('Europe/London');
$now = new DateTime();
$dateTimeNow = $now->format("Y-m-d H:i:s");
$_dt = date('Y-m-d H:i:s', strtotime($dateTimeNow));
$lastDate = new lastLog();
$lastDate->LogOutDate($_user, $_dt);

This is where the user and datetime is being sent to

public function LogOutDate($user,$dt){
try{
$_user = $this->db->connection->real_escape_string($user);
$_date = $this->db->connection->real_escape_string($dt);
$query = "UPDATE adminuser SET date=DATETIME('{$_date}') WHERE user='$_user'";
$result = $this->db->connection->query($query);
if(!$result){
throw new Exception($query);
} else {
$this->success = true;
}
} catch (Exception $e) {
echo("Error: " . $e->getMessage());
}
}

Answer 1

Change following code

$query = "UPDATE adminuser SET date=DATETIME('{$_date}') WHERE user='$_user'";

to

$query = "UPDATE adminuser SET date='$_date' WHERE user='$_user'";