- date: documentation ( source)
- strtotime: documentation ( source)
<?php
print(date('Y w', strtotime('Monday', strtotime('yesterday')))."\n");
print(date('Y w', strtotime('Monday this week', strtotime('yesterday')))."\n");
print(date('Y w', strtotime('this Monday', strtotime('yesterday')))."\n");
print(date('Y w', strtotime('last Monday', strtotime('yesterday')))."\n");