3v4l.org

run code in 300+ PHP versions simultaneously
<?php $get = '2017-07-16'; $date = new DateTime($get, new DateTimeZone('Europe/Helsinki')); $date = $date->format('Y-m-d'); echo $date .'\n'; $weekdate = date($date, strtotime('last Monday')); $weekdate = strtotime($weekdate); echo $weekdate;

preferences:
36.46 ms | 402 KiB | 5 Q