php - A non well formed numeric value encountered in - setcookie function -

            $user_id = $row['userid'];             $token = uniqid($user_id,true);             $salt = md5(mt_rand());             $cookie_id = hash_hmac('sha512',$token,$salt);              $nextweek = time() + (7 * 24 * 60 * 60);             $expiry = date('y-m-d', $nextweek);             //problem exists here                             $sql_store_cookie = "insert pcookies(cookie_id,user_id,expiry,salt) values('$cookie_id','$user_id','$expiry','$salt')";             mysqli_query($connection,$sql_store_cookie) or die(mysqli_error($connection));//die('{"l":"mysqli_error(`$connection`)"}');             setcookie($cookie_id,$token,$expiry); 

if run above program, getting non formed numeric value warning in setcookie line. hope using correct format of type.

my timezone setting asia/kolkata , expiry data type timestamp.

i trying set 7 days current time.

please tell me doing wrong here. thanks.

if read the manual, see box third parameter

note: may notice expire parameter takes on unix timestamp, opposed date format wdy, dd-mon-yyyy hh:mm:ss gmt, because php conversion internally.

so need following instead

setcookie($cookie_id,$token,$nextweek);