date add one day php

<?php
$stop_date = '2009-09-30 20:24:00';
echo 'date before day adding: ' . $stop_date; 
$stop_date = date('Y-m-d H:i:s', strtotime($stop_date . ' +1 day'));
echo 'date after adding 1 day: ' . $stop_date;
?><?php 
// PHP program to add days to $Date 
  
// Declare a date 
$date = "2019-05-10"; 
  
// Add days to date and display it 
echo date('Y-m-d', strtotime($date. ' + 10 days')); 
  
?> $date = new DateTime('2000-01-01');
$date->add(new DateInterval('P1D'));$created_at=date('Y-m-d H:i:s', strtotime(date("Y-m-d H:i:s") . ' +1 day'));