UPDATE prepared statement PHP Error
Question
I am creating a dynamic page which changes depending on which ever post the user clicks onto. I am also wanting the views (hit-counter) the page gets to go up by one each time the page is loaded. I am currently getting the following error.
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 answers
solution1
2 2014-02-12 14:56:11
Remove ( ' ) single quotes in update query and use backtick (`) instead
So
"UPDATE `forum` SET `Views` = Views+ 1 WHERE `ForumId` = ?"
solution2
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. This will tell you that you have a syntax error near 'forum' SET 'Vi... . That in itself should indicate that that specific character (the first ' in the string) is the most likely cause of the error.
solution3
0 ACCPTED 2014-02-12 15:07:43
It seems you have a problem in the query.
Take note, that PDO statement dont need single quotes
Try with this:
$stmt = $mysqli->prepare("UPDATE forum SET Views = Views+ 1 WHERE ForumId = ?");
$stmt->bind_param('i', $post);
solution4
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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