PHP add number of days into date

PHP supports various date types and its conversion.
The following php example demonstrate to add n number of days in the provided date.

For date format: yyyy-mm-dd

function addDate($date,$n)
  {
 $dateArray=explode('-',$date);
 $addDate = mktime(0,0,0,$dateArray[1],$dateArray[2]+$n,$dateArray[0]);
 return date("Y-m-d", $addDate);
  }
  
  Usage of the function is as follows:
 
  $n = 1;
  $date = "2014-06-01";
 
  echo addDate($date, $n);
 
  Ouput is: 2014-06-02
 
For date format: yyyy/mm/dd

function addDate($date,$n)
  {
 $dateArray=explode('/',$date);
 $addDate = mktime(0,0,0,$dateArray[1],$dateArray[2]+$n,$dateArray[0]);
 return date("Y-m-d", $addDate);
  }
 
  Usage of the function is as follows:
 
  $n = 1;
  $date = "2014/06/01";
 
  echo addDate($date, $n);
 
  Ouput is: 2014/06/02