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  1. <?php
  2.  
  3. // your code goes here
  4. function pr($array_to_output)
  5. {
  6. print '<pre>';
  7. print_r($array_to_output);
  8. print '</pre>';
  9. }
  10.  
  11.  
  12. $date = new DateTime();
  13. pr( $date );
  14.  
  15. $date->modify("+20 minutes"); //or whatever value you want
  16. pr( $date );
Success #stdin #stdout 0.01s 20568KB
stdin
Standard input is empty
stdout
<pre>DateTime Object
(
    [date] => 2014-01-12 11:19:50
    [timezone_type] => 3
    [timezone] => UTC
)
</pre><pre>DateTime Object
(
    [date] => 2014-01-12 11:39:50
    [timezone_type] => 3
    [timezone] => UTC
)
</pre>