PHP timestamp - first day of the week

Question

Need to find the timestamp for the first minute of the first day of the current week.

What is the best way to do this?

<?php

$ts = mktime(); // this is current timestamp

?>

Answer 1

If Monday is your first day:

$ts = mktime(0, 0, 0, date("n"), date("j") - date("N") + 1);

Answer 2

If you think Monday is the first day of the current week...

$ts = strtotime('Last Monday', time());

If you think Sunday is the first day of the current week...

$ts = strtotime('Last Sunday', time());