Are there any built-in PHP functions that can be used to determine a person's age based on their birth date?

To determine a person's age based on their birth date in PHP, you can use the `DateTime` class along with the `diff` method to calculate the difference between the birth date and the current date. This will give you the number of years between the two dates, which represents the person's age. 

$birthDate = new DateTime('1990-05-15');
$currentDate = new DateTime();
$age = $currentDate->diff($birthDate)->y;

echo "The person's age is: " . $age;

Keywords

PHP built-in functions age calculation date manipulation birth date

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