What are the potential consequences of using incorrect values in PHP form elements?

Using incorrect values in PHP form elements can lead to errors in data processing, validation, and storage. This can result in unexpected behavior in the application, security vulnerabilities, and data corruption. To prevent this issue, always validate and sanitize user input before using it in your PHP code. 

// Example of validating and sanitizing user input in a PHP form element
$name = isset($_POST['name']) ? htmlspecialchars($_POST['name']) : '';
$email = isset($_POST['email']) ? filter_var($_POST['email'], FILTER_SANITIZE_EMAIL) : '';

Keywords

data validation input sanitization security vulnerability SQL injection cross-site scripting

Related Questions