What security measures should be implemented to protect dynamically loaded content in PHP?

To protect dynamically loaded content in PHP, it is important to sanitize user input to prevent SQL injection and cross-site scripting attacks. Additionally, validate and filter any input data before using it in queries or displaying it on the webpage. Implementing prepared statements and parameterized queries can also help prevent injection attacks. 

// Example of sanitizing user input before using it in a query
$user_input = $_POST['user_input'];
$sanitized_input = filter_var($user_input, FILTER_SANITIZE_STRING);

// Example of using prepared statements to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->bindParam(':username', $sanitized_input);
$stmt->execute();

Keywords

PHP security measures dynamically loaded content input validation cross-site scripting

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