How to Calculate Age in PHP

In this article, you will learn how to calculate age based on birthdate in PHP.

Let’s say you have 2 string variables containing date of birth and current date.

$birthDate = "17-10-1998";

$currentDate = date("d-m-Y");

Calculate Age

In order to calculate age based on birthdate, you can use the date_diff() method and date_create() method.

$birthDate = "17-10-1998";

$currentDate = date("d-m-Y");

$age = date_diff(date_create($birthDate), date_create($currentDate));

echo "Current age is ".$age->format("%y");
// Current age is 22

Note: The date_diff() method functions by calculating the mathematical difference of two supplied dates. The date_create() method functions by creating a DateTime object from a supplied string.