- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$now = strtotime('now');
$next_monday = strtotime('Thursday');
if (($next_monday-$now) < (3*86400)){
$next_monday = $next_monday + 604800;//add a week
echo date('Y-m-d', $next_monday) . "T00:00:00";
}else{
echo date('Y-m-d', $next_monday) . "T00:00:00";
}
?>