Are there best practices for handling and displaying country information retrieved from a WhoIs query in PHP?

When handling and displaying country information retrieved from a WhoIs query in PHP, it is important to sanitize and validate the data to prevent any security vulnerabilities or errors. One way to achieve this is by using PHP's filter_var function with the FILTER_SANITIZE_STRING flag to clean the country information before displaying it on the website.

// Retrieve country information from WhoIs query
$country = "USA"; // Example country information

// Sanitize and validate the country information
$sanitized_country = filter_var($country, FILTER_SANITIZE_STRING);

// Display the sanitized country information
echo "Country: " . $sanitized_country;