add one date php code example

Example 1: date add one day php

$created_at=date('Y-m-d H:i:s', strtotime(date("Y-m-d H:i:s") . ' +1 day'));

Example 2: add 1 day php datetime

$date = new DateTime('2000-01-01');
$date->add(new DateInterval('P1D'));