What potential issue could arise from the SQL query used to fetch posts for pagination in the PHP forum?

The potential issue that could arise from the SQL query used to fetch posts for pagination in the PHP forum is that it may not handle large datasets efficiently, leading to slow performance. To solve this issue, we can use LIMIT and OFFSET in the SQL query to fetch only a subset of results at a time based on the current page number and the number of posts per page. 

// Calculate the OFFSET based on the current page number and the number of posts per page
$postsPerPage = 10;
$currentPage = isset($_GET['page']) ? $_GET['page'] : 1;
$offset = ($currentPage - 1) * $postsPerPage;

// Fetch posts with LIMIT and OFFSET
$query = "SELECT * FROM posts ORDER BY created_at DESC LIMIT $postsPerPage OFFSET $offset";
$result = mysqli_query($connection, $query);

// Display posts
while ($row = mysqli_fetch_assoc($result)) {
    // Display post content
}

Keywords

SQL injection pagination PHP forum database query security vulnerability

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