What are common pitfalls when implementing PHP scripts for forums?

One common pitfall when implementing PHP scripts for forums is not properly sanitizing user input, which can lead to security vulnerabilities such as SQL injection attacks. To solve this issue, always use prepared statements or parameterized queries when interacting with the database to prevent malicious input from being executed. 

// Example of using prepared statements to sanitize user input
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->execute(['username' => $_POST['username']]);
$user = $stmt->fetch();

Keywords

SQL injection Cross-site scripting CSRF attacks session hijacking input validation

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