PHP calculate age

Question

This works fine.

<?php
  //date in mm/dd/yyyy format; or it can be in other formats as well
  $birthDate = "12/17/1983";
  //explode the date to get month, day and year
  $birthDate = explode("/", $birthDate);
  //get age from date or birthdate
  $age = (date("md", date("U", mktime(0, 0, 0, $birthDate[0], $birthDate[1], $birthDate[2]))) > date("md")
    ? ((date("Y") - $birthDate[2]) - 1)
    : (date("Y") - $birthDate[2]));
  echo "Age is:" . $age;
?>

$tz  = new DateTimeZone('Europe/Brussels');
$age = DateTime::createFromFormat('d/m/Y', '12/02/1973', $tz)
     ->diff(new DateTime('now', $tz))
     ->y;

As of PHP 5.3.0 you can use the handy DateTime::createFromFormat to ensure that your date does not get mistaken for m/d/Y format and the DateInterval class (via DateTime::diff) to get the number of years between now and the target date.

 $date = new DateTime($bithdayDate);
 $now = new DateTime();
 $interval = $now->diff($date);
 return $interval->y;

I use Date/Time for this:

$age = date_diff(date_create($bdate), date_create('now'))->y;

Simple method for calculating Age from dob:

$_age = floor((time() - strtotime('1986-09-16')) / 31556926);

31556926 is the number of seconds in a year.

// Age Calculator

function getAge($dob,$condate){ 
    $birthdate = new DateTime(date("Y-m-d",  strtotime(implode('-', array_reverse(explode('/', $dob))))));
    $today= new DateTime(date("Y-m-d",  strtotime(implode('-', array_reverse(explode('/', $condate))))));           
    $age = $birthdate->diff($today)->y;

    return $age;
}

$dob='06/06/1996'; //date of Birth
$condate='07/02/16'; //Certain fix Date of Age 
echo getAge($dob,$condate);