How can the code snippet be refactored to utilize more modern PHP features like DateTime objects for age calculation?

The code snippet can be refactored to utilize more modern PHP features like DateTime objects for age calculation. This involves creating DateTime objects for the current date and the user's birthdate, calculating the difference between the two dates, and then extracting the years from the difference to get the user's age. 

function calculate_age($birthdate) {
    $currentDate = new DateTime();
    $birthDate = new DateTime($birthdate);
    $age = $currentDate->diff($birthDate)->y;
    return $age;
}

$birthdate = '1990-05-15';
$age = calculate_age($birthdate);
echo "The user's age is: " . $age;

Keywords

refactor modern PHP DateTime objects age calculation code snippet

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