What are some common pitfalls when calculating a person's age based on their birthday in PHP?

One common pitfall when calculating a person's age based on their birthday in PHP is not accounting for leap years. To accurately calculate someone's age, you need to consider leap years when determining the number of days between the birthdate and the current date. One way to solve this issue is by using the DateTime class in PHP, which takes leap years into account when calculating differences between dates. 

$birthdate = new DateTime('1990-02-29');
$currentDate = new DateTime();
$interval = $birthdate->diff($currentDate);
$age = $interval->y;
echo "The person's age is: " . $age;

Keywords

DateTime date_diff strtotime birthday calculation

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