What are some best practices for handling form data in PHP, especially when it comes to database interactions?

When handling form data in PHP, especially when interacting with a database, it is important to sanitize and validate the input to prevent SQL injection and other security vulnerabilities. One best practice is to use prepared statements with parameterized queries to securely interact with the database. 

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

// Create a prepared statement
$stmt = $pdo->prepare("INSERT INTO users (name, email) VALUES (:name, :email)");
$stmt->bindParam(':name', $name);
$stmt->bindParam(':email', $email);

// Execute the statement
$stmt->execute();

Keywords

SQL injection prepared statements PDO data validation form submission.

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