Question

我正在尝试编写一个查询，将用户所在的当前页面发送到我的数据库表click_count。我不确定我做错了什么，因为我现在的错误报告中没有任何错误。没有执行任何查询，也没有显示任何回显错误。

我不确定问题是否与我正在构建会话的方式有关。 SELECT。我要做的是执行INSERT查询以查看是否有记录，如果没有，则UPDATE一个，然后从那一点page_count每次click_count CREATE TABLE `click_count` ( `id` int(11) NOT NULL AUTO_INCREMENT, `user_id` int(11) NOT NULL, `page_url` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `page_count` int(11) NOT NULL, PRIMARY KEY (`id`) )用户进入页面。

有没有人看到任何指出可能有问题的东西？

表click_count：

session_start();
//create current page constant
$curPage = $_SERVER['PHP_SELF'];
//echo $_SERVER['REQUEST_URI']; 
//set number of clicks variable to 0
$clicks = 0;

   //set current page as session variable
   $_SESSION['page'] = $curPage;
//do not recount if page currently loaded
if($_SESSION['page'] != $curPage) {


    $click_sql = "
    SELECT *
    FROM click_count
    WHERE user_id = ?
    AND page_url = ?
    ";
    if (!$click_stmt = $con->prepare($click_sql)) {
        $click_stmt->execute(array($user_id, $curPage));
        $click_stmt_rows = $click_stmt->fetchAll(PDO::FETCH_ASSOC);
        $page_count = $click_stmt->rowCount();
        if (!$click_stmt->errno) {
            echo "Error selecting page count.";
        }
    } else if ($page_count == 0) {
        //try to create new record and set count for new page to 1
         //output error message if problem encountered
            $click_insert_stmt = "
            INSERT INTO click_count 
            (page_url, page_count)
            VALUES(?, ?)";

         if(!$click_stmt = $con->prepare($click_insert_stmt)) {
            $click_insert_stmt->execute(array($curPage, 1));
            echo "Could not create new click counter.";
         }
         else {
            $clicks = 1;
         }
    } else {
    //get number of clicks for page and add 1     fetch(PDO::FETCH_BOTH)
        while($click_row = $click_insert_stmt->fetch(PDO::FETCH_BOTH)) {
            $clicks = $row['page_count'] + 1;
            //update click count in database;
            //report error if not updated

            $click_update_stmt = "
            UPDATE click_count
            SET page_count=page_count+1
            WHERE page_url = ?
            ";
            if(!$click_stmt = $con->prepare($click_update_stmt)) {
                $click_update_stmt->execute(array($curPage)); 
                echo "Could not save new click count for this page.";
         }
        }
    }
}

代码：

$curPage = $_SERVER['PHP_SELF'];
$clicks = 0;

    $click_sql = "
    SELECT *
    FROM click_count
    WHERE user_id = ?
    AND page_url = ?
    ";
        $click_stmt = $con->prepare($click_sql);
        $click_stmt->execute(array($user_id, $curPage));
        $click_stmt_rows = $click_stmt->fetchAll(PDO::FETCH_ASSOC);
        $page_count = $click_stmt->rowCount();
    if ($page_count == 0) {
        //try to create new record and set count for new page to 1
         //output error message if problem encountered
            $click_insert_stmt = "
            INSERT INTO click_count 
            (user_id, page_url, page_count)
            VALUES(?, ?, ?)";

         if(!$click_stmt = $con->prepare($click_insert_stmt)) {
            $click_insert_stmt->execute(array($user_id, $curPage, 1));
            echo "Could not create new click counter.";
         }
         else {
            $clicks = 1;
         }
    } else {
    //get number of clicks for page and add 1     fetch(PDO::FETCH_BOTH)
        while($click_row = $click_insert_stmt->fetch(PDO::FETCH_BOTH)) {
            $clicks = $row['page_count'] + 1;
            //update click count in database;
            //report error if not updated

            $click_update_stmt = "
            UPDATE click_count
            SET page_count=page_count+1
            WHERE user_id = ?
            AND page_url = ?
            ";
            if(!$click_stmt = $con->prepare($click_update_stmt)) {
                $click_update_stmt->execute(array($user_id, $curPage)); 
                echo "Could not save new click count for this page.";
         }
        }
    }

更新代码：

$curPage = $_SERVER['PHP_SELF'];
$clicks = 0;

    $click_sql = "
    SELECT *
    FROM click_count
    WHERE user_id = ?
    AND page_url = ?
    ";
    $click_stmt = $con->prepare($click_sql);
    $click_stmt->execute(array($user_id, $curPage));
    $click_stmt_rows = $click_stmt->fetchAll(PDO::FETCH_ASSOC);
    $page_count = $click_stmt->rowCount();
    if ($page_count == 0) {
        $click_insert_sql = "
            INSERT INTO click_count 
            (user_id, page_url, page_count)
            VALUES(?, ?, ?)
            ON DUPLICATE KEY UPDATE page_count=page_count+1;
        ";
        $click_insert_stmt = $con->prepare($click_insert_sql);
        $click_insert_stmt->execute(array($user_id, $curPage, 1));
    }

最新代码：

Answer 1

这是一个失败点：

//set current page as session variable
$_SESSION['page'] = $curPage;
//do not recount if page currently loaded
if($_SESSION['page'] != $curPage) {

您将$ _SESSION ['page']的值设置为$ curPage，然后检查该值是否与$ curPage不同。你只需将它设置为该值，因此它不能是不同的

你应该检查$ _SESSION ['page']是否先设置，如果没有设置，设置是否设置，如果已经设置，则检查它的值

if (isset($_SESSION['page']) && $_SESSION['page'] != $curPage) {
  // increment counter
} else {
  $_SESSION['page'] = $curPage;
  // add new record
}

或者，如果您只使用INSERT ON DUPLICATE KEY UPDATE，则可以跳过所有逻辑并执行：

INSERT INTO click_count (user_id, page_url, page_count) VALUES (?, ?,?)
  ON DUPLICATE KEY UPDATE page_count=page_count+1;

您无需检查该页面是否有记录，您无需查看当前值。查询将处理它。您必须在user_id和page_url

上定义组合的唯一键

Answer 2

<强> 更改

1）删除if($_SESSION['page'] != $curPage) {

2）我不知道你为什么在多个地方写这个if(!$click_stmt=$con->prepare($click_insert_stmt)){。不幸的是，如果这些准备陈述失败了，那么，它将如何准备＆amp;执行声明。

3） $user_id对我来说是一个谜。因为，我没有看到你初始化它的任何地方。

我已经更新了你的代码。看看。

更新代码

$click_sql = "SELECT * FROM click_count WHERE user_id = ? AND page_url = ?";
$click_stmt = $con->prepare($click_sql);
$click_stmt->execute(array($user_id, $curPage));
$page_count = $click_stmt->rowCount();

if ($page_count == 0) {
  $page_count ++;
  $click_insert_stmt = "INSERT INTO click_count (page_url, page_count, user_id) VALUES(?, ?, ?)";
  $click_stmt = $con->prepare($click_insert_stmt);
  if(!$click_insert_stmt->execute(array($curPage, $page_count, $user_id))){
    echo "Could not create new click counter.";
  }
} else {
  $click_update_stmt = "UPDATE click_count SET page_count= page_count+1 WHERE page_url = ? AND user_id = ?";
  $click_stmt = $con->prepare($click_update_stmt);
  if(!$click_update_stmt->execute(array($curPage,$user_id))){
    echo "Could not save new click count for this page.";
  }
}

将当前页面URL发送到数据库

2 个答案: