PHP Date minus month

[wilna]

Hi, I'm having trouble with this:

 

$date = date('d/m/y') ;
echo $date;
echo "<br/>";
$date1 = strtotime('date -1 month');
echo date('Y-m-d', $date1);

 

My result looks like this:

Current Date:  19/05/11

Date minus 1 month:  1970-01-01

 

I want it to look like this:

Current Date:  19/05/11

Date minus 1 month:  2011-04-19

[anupamsaha]

$date1 = strtotime('-1 month');

[wilna]

Thank you so very much!