How can developers ensure the security of their PHP code when using the same names for form fields and database fields?

When using the same names for form fields and database fields in PHP, developers can ensure security by properly sanitizing and validating user input before using it in database queries. This helps prevent SQL injection attacks and ensures that only expected data is being inserted into the database. 

// Sanitize and validate user input before using it in a database query
$username = filter_input(INPUT_POST, 'username', FILTER_SANITIZE_STRING);
$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL);

// Prepare and execute a safe database query using PDO
$stmt = $pdo->prepare("INSERT INTO users (username, email) VALUES (:username, :email)");
$stmt->bindParam(':username', $username);
$stmt->bindParam(':email', $email);
$stmt->execute();

Keywords

SQL injection input validation prepared statements cross-site scripting data sanitization

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