PHP后台设计：功能模块一览

// 添加用户
$stmt = $mysqli->prepare("INSERT INTO users(user_name, password) VALUES (?, ?)");
$stmt->bind_param("ss", $user_name, $password);
$stmt->execute();

// 更新密码
$stmt = $mysqli->prepare("UPDATE users SET password=? WHERE user_id=?");
$stmt->bind_param("si", $password, $user_id);
$stmt->execute();

// 删除用户
$stmt = $mysqli->prepare("DELETE FROM users WHERE user_id = ?");
$stmt->bind_param("i", $user_id);
$stmt->execute();

// 添加文章
$stmt = $mysqli->prepare("INSERT INTO articles(title, content, category_id) VALUES (?, ?, ?)");
$stmt->bind_param("ssi", $title, $content, $category_id);
$stmt->execute();

// 更新文章
$stmt = $mysqli->prepare("UPDATE articles SET title=?, content=?, category_id=? WHERE article_id=?");
$stmt->bind_param("ssii", $title, $content, $category_id, $article_id);
$stmt->execute();

// 删除文章
$stmt = $mysqli->prepare("DELETE FROM articles WHERE article_id = ?");
$stmt->bind_param("i", $article_id);
$stmt->execute();

// 查询订单
$stmt = $mysqli->prepare("SELECT * FROM orders WHERE order_id = ?");
$stmt->bind_param("i", $order_id);
$stmt->execute();
$result = $stmt->get_result();

// 更新订单状态
$stmt = $mysqli->prepare("UPDATE orders SET status=? WHERE order_id=?");
$stmt->bind_param("si", $status, $order_id);
$stmt->execute();

// 订单退款
$stmt = $mysqli->prepare("UPDATE orders SET status=?, refund_time=?, refund_reason=? WHERE order_id=?");
$stmt->bind_param("sssi", $status, $refund_time, $refund_reason, $order_id);
$stmt->execute();

// 更新站点信息
$stmt = $mysqli->prepare("UPDATE settings SET site_name=?, site_url=?, site_logo=? WHERE setting_id=1");
$stmt->bind_param("sss", $site_name, $site_url, $site_logo);
$stmt->execute();

// 查询站点信息
$stmt = $mysqli->prepare("SELECT * FROM settings WHERE setting_id = 1");
$stmt->execute();
$result = $stmt->get_result();
$settings = $result->fetch_array();