<?php
function generateSimpleId() {
    // Generates a random 4-digit number with a prefix
    return 'U' . str_pad(random_int(0, 9999), 4, '0', STR_PAD_LEFT);
}

function generateUltraId() {
    // Generates a more complex, unique ID using random bytes for better uniqueness
    return 'ULTRA-' . strtoupper(bin2hex(random_bytes(3))) . '-' . strtoupper(bin2hex(random_bytes(3)));
}

// Function to redirect and exit
function redirect($url) {
    header('Location: ' . $url);
    exit();
}

function get_user_by_id($user_id) {
    $pdo = db();
    $stmt = $pdo->prepare("SELECT * FROM users WHERE id = ?");
    $stmt->execute([$user_id]);
    return $stmt->fetch(PDO::FETCH_ASSOC);
}

function get_user_servers($user_id) {
    $pdo = db();
    $stmt = $pdo->prepare("
        SELECT s.* FROM servers s
        JOIN server_members sm ON s.id = sm.server_id
        WHERE sm.user_id = ?
    ");
    $stmt->execute([$user_id]);
    return $stmt->fetchAll(PDO::FETCH_ASSOC);
}

?>