Description:
------------
---
From manual page: http://www.php.net/function.date-modify
---
I'm sorry if I did do something wrong and waste your time, but I can't explain this behaviour:


date_create() gets assigned to a variable >>> $now

this variable ($now) is being copied to another variable ($later) and this new variable ($later) then modified with date_modify() to be 30 days in the past

ODD BEHAVIOUR:
after this is executed BOTH variables, $now and $later are 30 days in the past?

Test script:
---------------
<?php
$now = date_create(); # get current datetime

$later = $now; # copy $now to $later
date_modify($later,'-30 day');

$now_str = date_format($now,'Y-m-d H:i:s');	
$later_str = date_format($later,'Y-m-d H:i:s');

echo "\$now_str: ".$now_str."</br>";
echo "\$later_str: ".$later_str."</br>";
?>

/*
$now_str: 2011-07-20 22:05:31
$later_str: 2011-07-20 22:05:31
*/