How can PHP be used to implement a Jugendschutzsystem (youth protection system) like check2go?

To implement a Jugendschutzsystem like check2go using PHP, you can create a system that verifies the age of users before granting access to certain content or features. This can be done by prompting users to input their birthdate and then comparing it to a minimum age requirement. If the user is below the minimum age, they would be restricted from accessing the content.

<?php
// Minimum age requirement
$minimumAge = 18;

// Get user input birthdate
$userBirthdate = $_POST['birthdate'];

// Calculate user's age
$userAge = date_diff(date_create($userBirthdate), date_create('today'))->y;

// Check if user is above minimum age
if ($userAge >= $minimumAge) {
    // Grant access to content
    echo "You are old enough to access this content.";
} else {
    // Restrict access
    echo "You are not old enough to access this content.";
}
?>