Substracting days from a date

[netfrugal]

I have a variable:

$var = '2007-08-15'; // some random date

I want to substract 2 days from this variable, to make it say: 2007-08-13

I've tried: $var - 2;

doesn't get me anything but '2005'

Any ideas?

[maxpup979]

Check the manual:
http://us3.php.net/manual/en/function.date.php
It is possible to use date() and mktime() together to find dates in the future or the past.

Example 438. date() and mktime() example

<?php
$tomorrow  = mktime(0, 0, 0, date("m")  , date("d")+1, date("Y"));
$lastmonth = mktime(0, 0, 0, date("m")-1, date("d"),   date("Y"));
$nextyear  = mktime(0, 0, 0, date("m"),   date("d"),   date("Y")+1);
?> 

And one that should do the trick for you:

<?php 
$day=17;
$month=8;
$year=2007;
$d=date("Y-m-d",mktime(0,0,0,$month,$day-2,$year));
print $d;
?>

[NogDog]

$var = '2007-08-15';
$var_minus_2_days = date('Y-m-d', strtotime('-2 days', strtotime($var)));