Question

I have for example:

$week_number = ’13’;
$year = ‘2012’;

13 week in 2012 year this is range days from 26.03.2012 to 1.04.2012. How can i get and show this with PHP?

Answer 1

The strtotime() function understands a nicely nuanced grammar for describing times.

<?php

date_default_timezone_set("America/Toronto");

$week_number = '13';
$year = '2012';

$epoch_start = strtotime($year . "0101 + " . $week_number . " weeks - 6 days");
$epoch_end   = strtotime($year . "0101 + " . $week_number . " weeks");

print "Start: " . strftime("%Y-%m-%d", $epoch_start) . "\n";
print "  End: " . strftime("%Y-%m-%d", $epoch_end) . "\n";

?>

Note that strtotime() appears to count full weeks, starting on Sundays. So January 1st 2011 would have been considered to be “week zero” of that year.

YMMV. Salt to taste.