Date minus 1 year?

Question

I\'ve got a date in this format:

2009-01-01

How do I return the same date but 1 year earlier?

Answer 1

// set your date here
$mydate = "2009-01-01";

/* strtotime accepts two parameters.
The first parameter tells what it should compute.
The second parameter defines what source date it should use. */
$lastyear = strtotime("-1 year", strtotime($mydate));

// format and display the computed date
echo date("Y-m-d", $lastyear);