How can the age of a registered user be calculated in PHP based on their birthdate variables?

To calculate the age of a registered user in PHP based on their birthdate variables, you can use the DateTime class to get the current date and the user's birthdate, then calculate the difference in years between the two dates. 

// Assuming $birthdate is the user's birthdate in 'YYYY-MM-DD' format
$birthdate = '1990-05-15';

// Calculate the age based on the user's birthdate
$today = new DateTime();
$diff = $today->diff(new DateTime($birthdate));
$age = $diff->y;

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

Keywords

PHP date calculation birthdate user

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