how php compare two DateTime object

[harivallabhshukla]

how php compare two dateTime object with comparator operator
$date1=new DateTime("07-03-2010");
$date2=new Datetime("21-09-2015");
if($date2>$date1)
{
echo "two datetime object has compared";
}

[johnj]

The DateTime class has a method called diff(). Use that to compare dates
example:

Code: Select all

$interval = $date1->diff($date2);
echo $interval->format('%R%a days');


if the $interval is a positive value than $date1 is greater than $date2.

[harivallabhshukla]

when i use comparator operator then also it give correct result
i.e Below code give correct result


if($date2>$date1)
{
echo "date2 is greater than date1";
}


BUT WHY?

[johnj]

check the php manual, based on php version, there are some changes to this class.

[harivallabhshukla]

can you give me link where i can get this information.Thanks in advance

[johnj]

If your version of php allowes to compare the class instances ($date1 and $date2) then please go ahead and follow that route.
http://www.php.net/manual/en/datetime.construct.php