given date( ' H:i:s ' ), how do I set variable to 15 minutes prior? 2

[casabella]

I need the algorithm to do time math. I need to run a query against entries time stamped 15 minutes ago or earlier. I am stuck getting the time stamp to work.

I tried this:

$a = date('H:i:s');
$b = '00:15:00';
$c = $a - $b;
echo $a . '<br />';
echo $b . '<br />';
echo $c . '<br />';

and I am getting:

23:17:00
00:15:00
23

I am expecting

23:17:00
00:15:00
23:02:00

Thank you all in advance for your assistance!


Jose

 

[jpadie]

to get a time 15 minutes prior to now

echo date("h:i:s", strtotime('-15 minutes'));

 

[casabella]

Thanks!


Jose