What best practices should be followed when handling form data in PHP to ensure data integrity and security?

When handling form data in PHP, it is important to validate and sanitize the input to ensure data integrity and security. This can be done by using PHP functions like filter_var() and htmlspecialchars() to filter out any malicious input or unwanted characters. Additionally, it is recommended to use prepared statements when interacting with a database to prevent SQL injection attacks. 

// Validate and sanitize form data
$name = filter_var($_POST['name'], FILTER_SANITIZE_STRING);
$email = filter_var($_POST['email'], FILTER_VALIDATE_EMAIL);

// Use prepared statements to interact with the database
$stmt = $pdo->prepare("INSERT INTO users (name, email) VALUES (:name, :email)");
$stmt->bindParam(':name', $name);
$stmt->bindParam(':email', $email);
$stmt->execute();

Keywords

SQL injection data validation prepared statements CSRF protection input sanitization

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