How can PHP developers ensure proper handling of form data to prevent errors and maintain security?

To ensure proper handling of form data in PHP, developers should sanitize and validate user input to prevent errors and maintain security. This can be done by using functions like filter_var() to sanitize input and validate data against expected formats. Additionally, developers should use prepared statements when interacting with databases to prevent SQL injection attacks. 

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

// Use prepared statements to prevent SQL injection
$stmt = $pdo->prepare("INSERT INTO users (name, email) VALUES (:name, :email)");
$stmt->bindParam(':name', $name);
$stmt->bindParam(':email', $email);
$stmt->execute();

Keywords

Sanitization Validation Cross-site scripting (XSS) SQL injection CSRF protection

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