Question

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Find Month difference in php?

My server hosts multiple websites, and with some of the librarys I am using, it will be very difficult upgrading to php 5.3. I plan to do it in the near future, but not at the moment.

I have two timestamps, and I want to calculate how many months are between them. PHP 5.3 has the datetime.diff function, but since I am on 5.2, I currently can not use this.

What alternatives are there for me? I know I can just grab the seconds by subtracting the timestamps and then get the months by assuming every month has 30 days, but I will be needing an accurate result.

Your help is much appreciated.

Answer 1

Personally I go for this method:

$from = explode("-",date("Y-m-d",$fromStamp));
$to = explode("-",date("Y-m-d",$toStamp));
$months = ($to[0]-$from[0])*12+$to[1]-$from[1];
if( $to[1] == $from[1] && $to[2] > $from[2]) $months--; // incomplete month
if( $to[1] == ($from[1]+1)%12 && $to[2] < $from[2]) $months--; // other side
// result in $months