In what ways can outdated PHP and MySQL versions impact the functionality of a web application?

Outdated PHP and MySQL versions can impact the functionality of a web application by leaving it vulnerable to security risks and lacking support for newer features and optimizations. To solve this issue, it is important to regularly update both PHP and MySQL to the latest stable versions to ensure the security and performance of the web application.

// Example code for updating PHP version
// Check your current PHP version
echo phpversion();

// Update PHP to the latest version
// This process may vary depending on your server setup
// Consult your hosting provider or system administrator for guidance