Write a PHP script to get the last 6 months from the current month

<?php
for ($i = 1; $i <= 6; $i++) 
{
   $months[] = date("Y-m%", strtotime( date( 'Y-m-01' )." -$i months"));
}
var_dump($months);
?>

Sample Output:

array(6) {                                                  
  [0]=>                                                     
  string(8) "2017-01%"                                      
  [1]=>                                                     
  string(8) "2016-12%"                                      
  [2]=>                                                     
  string(8) "2016-11%"                                      
  [3]=>                                                     
  string(8) "2016-10%"                                      
  [4]=>                                                     
  string(8) "2016-09%"                                      
  [5]=>                                                     
  string(8) "2016-08%"                                      
}