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我们正在编写一个简单的视频播放器,它的部分功能是向 Web 服务器上的 PHP 页面发送一个简单的 GET 请求,用客户的活动更新数据库(即,他们正在观看的视频的 ID,他们是什么位置,以及他们的用户 ID):

listener.php?user=1&time=59000&movie_id=35003

这个 listener.php 非常简单,它会检查是否已经存在对应这个特定用户 ID 和电影 ID 的行:

SELECT orders_products_id,
    products_date_last_watched as lasttime,
    now() as now,
    products_timewatched
  from orders_products
    where products_id = '" . $product_id . "' and
    customers_id = '" . $customer_id ."'

其次是:

if ($check['orders_products_id'] > 0)

如果为真,它将运行 UPDATE 语句

如果为 false,它将运行 INSERT 语句

现在,问题是,如果我在浏览器中加载这个 listener.php 并直接在 URL 中更改值,它会按预期工作。

但是,当程序调用同一个页面时,它总是会插入一个新行。服务器的日志显示正确的 URL:

"GET /listener.php?user=1&time=128142&movie_id=35003 HTTP/1.1" 200 - "-" "Mozilla/5.0"

有任何想法吗?这是在我的测试服务器上运行的,它是 Windows 2008R2 上的 XAMPP,如果这有什么不同吗?

编辑:这是完整的代码:

header("Cache-Control: no-cache, must-revalidate");
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");

include('includes/application_top.php');


$user_id = $_GET['user'];
$lastpos = $_GET['time'];
$product_id = $_GET['movie_id'];
$episode = 0;

//check for existing listing
$check_query = tep_db_query("SELECT orders_products_id, products_date_last_watched as lasttime, now() as now, products_timewatched from orders_products where products_id = '" . $product_id . "' and customers_id = '" . $customer_id ."' and products_lastepisode = '" . $episode . "'");
$check = tep_db_fetch_array($check_query);

if ($check['orders_products_id'] > 0) {
//user has already watched this


//find seconds between last timestamp and now
$starttime = strtotime($check['lasttime']);
$endtime = strtotime($check['now']);
$difference = $endtime - $starttime;

if ($difference < 60) {
    $totaltime = $check['products_timewatched'] + $difference;
} else {
    $totaltime = $check['products_timewatched'];
}

$update_query = "UPDATE orders_products set products_lastposition = '" . $lastpos ."', products_date_last_watched = now(), products_lastepisode = '" . $episode . "', products_timewatched = '" . $totaltime . "', products_platform = '" . $_SERVER['HTTP_USER_AGENT'] . "', customers_ip = '" . $_SERVER['REMOTE_ADDR'] ."' where orders_products_id = '" . $check['orders_products_id'] ."'";
tep_db_query($update_query);

} else {

//create new entry
if ($user_id != 999999999){
    tep_db_query("INSERT INTO orders_products (products_date_first_watched, products_visible, products_date_last_watched, customers_id, products_id, products_lastposition, products_lastepisode, products_timewatched) values (now(), 1, now(), '" . $user_id . "', '" . $product_id . "', '" . $lastpos ."', '" . $episode . "', 0)");
}
}

一些注意事项: - 用于 mysql 查询的“tep_db_query”,因为我使用的是 osCommerce 函数的修改版本,它在功能上与标准 mysql_query 和 mysql_fetch_array 相同 - 用户 ID 99999999 表示它是访客用户,不应记录他们的活动 -整个“//查找上一个时间戳和现在之间的秒数”是为了跟踪总时间花费

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1 回答 1

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没关系,我是个白痴... URL 变量是 $user_id 但我在 SQL 查询中查找了 $customer_id... facepalm

于 2013-07-05T04:28:13.427 回答