Date Difference in php on days? [duplicate]
I would recommend to use date->diff function, as in example below:
$dStart = new DateTime('2012-07-26');
$dEnd = new DateTime('2012-08-26');
$dDiff = $dStart->diff($dEnd);
echo $dDiff->format('%r%a'); // use for point out relation: smaller/greater
see http://www.php.net/manual/en/datetime.diff.php
strtotime will convert your date string to a unix time stamp. (seconds since the unix epoch.
$ts1 = strtotime($date1);
$ts2 = strtotime($date2);
$seconds_diff = $ts2 - $ts1;