What potential issues can arise when trying to calculate age without using a timestamp in PHP?

When trying to calculate age without using a timestamp in PHP, a potential issue that can arise is the accuracy of the calculation. Without a timestamp, it can be challenging to determine the exact age of a person, especially when considering factors such as leap years and different month lengths. One way to solve this issue is by using the DateTime class in PHP, which allows for more precise age calculations by taking into account the specific date and time. 

$birthdate = "1990-05-15";
$today = new DateTime();
$birthday = new DateTime($birthdate);
$age = $today->diff($birthday)->y;

echo "The person is $age years old.";

Keywords

date time calculation age PHP

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