What are the potential pitfalls of using PHP scripts to handle form submissions?

One potential pitfall of using PHP scripts to handle form submissions is the risk of SQL injection attacks if user input is not properly sanitized. To prevent this, always use prepared statements or parameterized queries when interacting with a database in PHP. 

// Example of using prepared statements to prevent SQL injection
$stmt = $pdo->prepare('INSERT INTO users (username, password) VALUES (:username, :password)');
$stmt->bindParam(':username', $_POST['username']);
$stmt->bindParam(':password', $_POST['password']);
$stmt->execute();

Keywords

SQL injection cross-site scripting form validation CSRF attacks file upload vulnerabilities

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