PHP Function to Calculate Age from Date of Birth

Make use of this simple PHP function to calculate age of person from the date of birth. Find your age with this simple php function. Find the age of celebrities with this simple php function.

function calculateAge($dob) {
            $date = $this->calculateDOB($dob);
            $dateObj = new DateTime($date);
            $nowObj = new DateTime();
            $interval = $nowObj->diff($dateObj);
            return $interval->y;
 }