<?php
$date=$_GET['date'];
$t_1=explode('/',$date);
$day=$t_1['0'];
$month=$t_1['1'];
$year=$t_1['2'];
$today     = mktime(0, 0, 0, date("m")  , date("d"), date("y"));
$old_date     = mktime(0, 0, 0, $month  , $date, $year);
$passed=round(($today-$old_date)/86400);
echo $passed;
?>