How to calculate the age of a person based on their birthdate using DateTime in PHP?

To calculate the age of a person based on their birthdate using DateTime in PHP, you can follow these steps:

Get the current date using the DateTime class:

$currentDate = new DateTime();

Convert the birthdate string into a DateTime object:

$birthdate = new DateTime('1990-05-20');

Calculate the difference between the current date and the birthdate:

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

Echo the calculated age:

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

Putting it all together, here's the complete code:

$currentDate = new DateTime();
$birthdate = new DateTime('1990-05-20');
$age = $birthdate->diff($currentDate)->y;

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

This will output: "The person's age is 31 years."