What are common pitfalls when using PHP in conjunction with JavaScript for form submissions?

One common pitfall when using PHP in conjunction with JavaScript for form submissions is not properly sanitizing user input, which can leave your application vulnerable to security risks such as SQL injection attacks. To solve this issue, always use prepared statements or parameterized queries when interacting with your database to prevent malicious input. 

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

$username = $_POST['username'];
$password = $_POST['password'];

$stmt->execute();

Keywords

PHP JavaScript form submissions AJAX validation

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