- var_dump: documentation ( source)
- floor: documentation ( source)
<?php
function datediffInWeeks($date1, $date2)
{
if($date1 > $date2) return datediffInWeeks($date2, $date1);
$first = DateTime::createFromFormat('Y-m-d', $date1);
$second = DateTime::createFromFormat('Y-m-d', $date2);
return floor($first->diff($second)->days/7);
}
var_dump(datediffInWeeks('2015-2-1', '6/21/2016'));// 21
var_dump(datediffInWeeks('2013-6-1', '1/2/2013'));// 21