<?php
$default = "2001-01-01 12:34:56";
$date='2018-06-29 00:00:00';
$startDate=(new DateTime($default))->setISODate(date('Y',strtotime($date)),date('W',strtotime($date)))->format('Y-m-d H:i:s');
$endDate=(new DateTime($default))->setISODate(date('Y',strtotime($date)), date('W',strtotime($date)), 7)->format('Y-m-d H:i:s');
$startTimestamp = (new DateTime($default))->setISODate(date('Y',strtotime($date)),date('W',strtotime($date)))->getTimestamp();
echo 'input = '.$date;
echo "\nstrtotime = ".strtotime($date);
echo "\nsetISODate->getTimestamp = ";
echo $startTimestamp;
echo "\nstartDate = ".$startDate."\nendDate = ".$endDate;
preferences:
58.45 ms | 402 KiB | 5 Q