- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$end_time = strtotime("Midnight today");
$end_time = strtotime("2015-04-13 00:00:00"); // FOR TESTING
$start_time = strtotime("-1 Week",$end_time);
$start_date = date("Y-m-d H:i:s",$start_time);
$end_date = date("Y-m-d H:i:s",$end_time);
echo $start_date . "\n\r";
echo $end_date . "\n\r";