How can PHP developers prevent users from manipulating data sent from JavaScript to PHP for database storage?

To prevent users from manipulating data sent from JavaScript to PHP for database storage, PHP developers can use server-side validation and sanitization techniques. This involves validating and sanitizing all data received from the client-side before processing or storing it in the database. By implementing strict input validation and using prepared statements with parameterized queries, developers can protect against SQL injection attacks and ensure the integrity of the data being stored. 

// Example of using prepared statements with PDO to prevent SQL injection
$pdo = new PDO('mysql:host=localhost;dbname=database', 'username', 'password');

// Validate and sanitize data received from JavaScript
$userInput = $_POST['user_input'];
$cleanInput = filter_var($userInput, FILTER_SANITIZE_STRING);

// Prepare a SQL statement with a placeholder
$stmt = $pdo->prepare("INSERT INTO table_name (column_name) VALUES (:input)");

// Bind the sanitized input to the placeholder
$stmt->bindParam(':input', $cleanInput);

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

Keywords

PHP JavaScript data validation SQL injection security

Related Questions