What is the potential issue with the PHP code provided in the forum thread regarding querying a database for a specific page and including it in the index file?

The potential issue with the PHP code provided is that it is vulnerable to SQL injection attacks as it directly concatenates user input into the SQL query. To solve this issue, you should use prepared statements with parameterized queries to prevent SQL injection attacks.

// Fix for querying a database for a specific page and including it in the index file using prepared statements

// Assuming $page_id is the user input for the page ID
$page_id = $_GET['page_id'];

// Establish a database connection
$pdo = new PDO('mysql:host=hostname;dbname=database', 'username', 'password');

// Prepare a SQL statement with a placeholder for the page ID
$stmt = $pdo->prepare('SELECT * FROM pages WHERE id = :page_id');
$stmt->bindParam(':page_id', $page_id);
$stmt->execute();

// Fetch the page data
$page = $stmt->fetch();

// Include the page content in the index file
echo $page['content'];