UPDATE准备好的语句PHP错误
[英]UPDATE prepared statement PHP Error
问题描述
I am creating a dynamic page which changes depending on which ever post the user clicks onto. 
我正在创建一个动态页面，该页面会根据用户点击过的帖子而变化。 I am also wanting the views (hit-counter) the page gets to go up by one each time the page is loaded. 我还希望每次加载页面时页面的视图（点击计数器）都增加一。 I am currently getting the following error. 我目前收到以下错误。
Fatal error: Call to a member function bind_param() on a non-object in C:\\Users\\PC\\Documents\\XAMPP\\htdocs\\post.php on line 13
<?php
session_start();
include 'php/config.php';
$post = $_GET['post'];
$stmt = $mysqli->prepare("SELECT * FROM forum WHERE ForumId = '$post'");
$stmt->execute();
$stmt->bind_result($ForumId,$ForumTitle,$ForumPostText,$PostDate,$Views);
$stmt->fetch();
$stmt->close();
$Views = 1;
$stmt = $mysqli->prepare("UPDATE 'forum' SET 'Views' = 'Views'+ 1 WHERE 'ForumId' = '?' ");
$stmt->bind_param('i',$post);
$stmt->execute();
$stmt->close();
?>
<!DOCTYPE html>
// The rest of the webpage yada yada yada
4 个解决方案
解决方案1
2 2014-02-12 14:56:11
Remove ( ' ) single quotes in update query and use backtick (`) instead 在更新查询中删除（ ' ）单引号，而使用反引号（`）
So 所以
"UPDATE `forum` SET `Views` = Views+ 1 WHERE `ForumId` = ?"
解决方案2
1 2014-02-12 15:02:47
Although Krish R's response is the solution, one of the things you will want to do in cases like this, is look at $mysqli->error to actually get an error message. 尽管Krish R的响应是解决方案，但是在这种情况下，您要做的一件事是查看$mysqli->error以实际获得错误消息。 This will tell you that you have a syntax error near 'forum' SET 'Vi... . 这将告诉您在'forum' SET 'Vi...附近有语法错误。 That in itself should indicate that that specific character (the first ' in the string) is the most likely cause of the error. 它本身应表明该特定字符（字符串中的第一个'）是最有可能导致错误的原因。
解决方案3
0 已采纳 2014-02-12 15:07:43
It seems you have a problem in the query. 看来您在查询中有问题。
Take note, that PDO statement dont need single quotes 请注意，PDO语句不需要单引号
Try with this: 试试这个：
$stmt = $mysqli->prepare("UPDATE forum SET Views = Views+ 1 WHERE ForumId = ?");
$stmt->bind_param('i', $post);
解决方案4
0 2014-02-12 15:08:24
<?php
session_start();
include 'php/config.php';
$post = $_GET['post'];
$stmt = $mysqli->prepare("SELECT * FROM forum WHERE ForumId = $post");
$stmt->execute();
$stmt->bind_result($ForumId,$ForumTitle,$ForumPostText,$PostDate,$Views);
$stmt->fetch();
$stmt->close();
$Views = 1;
$stmt = $mysqli->prepare("UPDATE forum SET Views = Views + 1 WHERE ForumId = ?");
$stmt->bind_param('i', $post);
$stmt->execute();
$stmt->close();
?>
<!DOCTYPE html>
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