Are there any PHP functions or methods specifically designed for extracting domain names from URLs?

When working with URLs in PHP, it can be useful to extract the domain name from a given URL. While there isn't a built-in PHP function specifically designed for this task, we can achieve this by using a combination of string manipulation functions to parse the URL and extract the domain name.

```php
$url = "https://www.example.com/page";
$domain = parse_url($url, PHP_URL_HOST);
echo $domain;
```

In this code snippet, we use the `parse_url` function to extract the host component (domain name) from the given URL. The `PHP_URL_HOST` constant specifies that we want to extract the host component from the URL. Finally, we echo out the extracted domain name.