<?php
function get_setting($key, $default = '') {
    global $pdo;
    try {
        $stmt = $pdo->prepare("SELECT setting_value FROM settings WHERE setting_key = ?");
        $stmt->execute([$key]);
        $res = $stmt->fetch();
        return $res ? $res['setting_value'] : $default;
    } catch (Exception $e) {
        return $default;
    }
}
?>