Question

im trying to get the first day of a given week based on inputting a week number and year. im currently using this for the current week and year and works like a charm.

$week = date('W');
$year = date('Y');
$date1 = date('Y-m-d', strtotime($year."W".$week.'1'));

however when i try to input my own week and year it doesn’t work

$week = 7;
$year = 2013;
$date1 = date('Y-m-d', strtotime($year."W".$week.'1'));

what type if string should i be using for strtotime? how come providing my own date doesn’t work?

Answer 1

Because the week numbers are supposed to be padded (and the extra 1 at the end doesn’t really do anything):

$date1 = date(
    'Y-m-d', 
    strtotime($year . 'W' . str_pad($week, 2, '0', STR_PAD_LEFT))
);