What considerations should be made when deciding between using sessions or URL parameters for language management in a PHP application?

When deciding between using sessions or URL parameters for language management in a PHP application, consider the security implications and user experience. Using sessions may be more secure as the language preference is stored server-side, but it may not be as flexible if users want to share links with a specific language preference. On the other hand, using URL parameters allows for easy language switching and sharing of links, but it may expose the language preference in the URL.

// Using sessions for language management
session_start();

if(isset($_GET['lang'])) {
    $_SESSION['lang'] = $_GET['lang'];
}

if(!isset($_SESSION['lang'])) {
    $_SESSION['lang'] = 'en'; // default language
}

// Use $_SESSION['lang'] to set language throughout the application
```

```php
// Using URL parameters for language management
if(isset($_GET['lang'])) {
    $lang = $_GET['lang'];
} else {
    $lang = 'en'; // default language
}

// Use $lang to set language throughout the application