What are some common pitfalls to avoid when using PHP to process form data?

One common pitfall to avoid when processing form data in PHP is not properly sanitizing user input, which can leave your application vulnerable to SQL injection attacks. To prevent this, always use prepared statements or parameterized queries when interacting with your database. 

// Example of using prepared statements to process form data
$stmt = $pdo->prepare("INSERT INTO users (username, email) VALUES (:username, :email)");
$stmt->bindParam(':username', $_POST['username']);
$stmt->bindParam(':email', $_POST['email']);
$stmt->execute();

Keywords

SQL injection Cross-site scripting (XSS) Form validation Sanitization Error handling

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