In what scenarios would it be more appropriate to calculate age based on comparing birthdate and current date rather than using a formula in PHP?

When dealing with age calculations, it is more appropriate to compare the birthdate with the current date rather than using a formula in PHP. This approach ensures accuracy, especially when considering factors like leap years and varying month lengths. By comparing the two dates directly, you can calculate the age reliably without worrying about potential inaccuracies.

$birthdate = new DateTime('1990-05-15');
$currentDate = new DateTime();

$age = $birthdate->diff($currentDate)->y;

echo "Age: " . $age;