Snippets → PHP

function birthday ($birthday){
    list($year,$month,$day) = explode("-",$birthday);
    $year_diff  = date("Y") - $year;
    $month_diff = date("m") - $month;
    $day_diff   = date("d") - $day;
    if ($day_diff < 0 || $month_diff < 0)
      $year_diff--;
    return $year_diff;
}

Comments (3) - Leave yours

1. Bill Wheeler said: July 12, 2012 at 12:03 pm

   PHP >=5.3 has a function/class built in to do this very thing….calculate the difference between two dates. Your function can easily whittled down to a couple of lines. )

   function birthday($birthday) {
   $diff = date_diff(date_create(), date_create($birthday));
   return $diff->y;
   }

   This will also support any date format that’s acceptable to PHP, not limited to YYYY-MM-DD.

   Hope this helps somebody!

2. René said: July 12, 2012 at 1:48 pm

   Another function for calculate the age of a person, and in this case the format of the birthday doesn’t mind. It can be 1990-07-19 or 19-07-1990.

   function birthday ($birthday)
   {
   $datetime1 = new DateTime($birthday);
   $datetime2 = new DateTime(date(‘Y-m-d’));
   $different = $datetime1->diff($datetime2);

   return $different->format(‘%y’);
   }

3. ljasinskipl said: July 13, 2012 at 5:04 am

   Doesn’t work right. There should be something like:
   if($month_diff < 0)
   $year_diff–;
   if($month_diff == 0 && $day_diff < 0)
   $year_diff–;
   instead of

   if ($day_diff < 0 || $month_diff < 0)