php date format YYYY-MM-DD minus or add one week from now?

Question

today 22-05-2011 so it should be 29-05-2011? ( plus 1 week ) 
or
today 22-05-2011 so it should be 15-05-2011? ( minus 1 week ) 

thanks for looking

Answer 1

You can use the DateTime class to do calendar calculations. For exaple, to add one week, you could use code like this:

$date = new DateTime('22-05-2011');
$date->modify('+1 week');

Answer 2

Use strtotime()

echo date('d-m-Y', strtotime("+1 week")); //1 week in the future
echo date('d-m-Y', strtotime("-1 week")); //1 week ago

Answer 3

strtotime will handle this.

$pDate = strtotime('22-05-2011 + 1 week');
echo date('d-m-Y',$pDate);

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Added: This is if you want to start from a specific date. If you just want 'today' +/- a week', mark JohnP's answer as correct. : )

Answer 4

In case If you dint want to hard code today's date you can use Carbon class methods of php.

Carbon::now()->subWeek(1);
Carbon::now()->addWeek(1);