What are the common pitfalls to avoid when using PHP for form submissions?

One common pitfall to avoid when using PHP for form submissions is not properly sanitizing user input, which can leave your application vulnerable to SQL injection attacks. To solve this issue, always use prepared statements or parameterized queries when interacting with a database to prevent malicious input from being executed as SQL commands. 

// Example of using prepared statements to sanitize user input
$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 protection error handling

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