add days in current date php

PHP
$date = new DateTime('2020-11-24');
$date->add(new DateInterval("P9D"));

echo $date->format('Y-m-d');<?php
  // adding extra days to date 
  
  // Steps:
	// 1) using carbon
    // 2) using strtotime
      
    //Step 1
  $date = date('Y M d h:i:s') // 2020 09 22 22:09:26 UTC
  
  $new_date = Carbon::parse($date->addDays(1); // adds extra day
                            
  // Step 2
  $date = date('Y M d h:i:s') // 2020 09 22 22:09:26 UTC
  
  echo $new_date = date('Y M d h:i:s', strtotime($date. '+1 day'));
?>
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