Is PHP suitable for automatically retrieving data from a website at regular intervals?

To automatically retrieve data from a website at regular intervals using PHP, you can use a combination of cURL for making HTTP requests and a scheduler like cron to run your PHP script at specified intervals. In the PHP script, you can fetch the desired data from the website, process it, and store it as needed.

```php
<?php
// Set up cURL
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://example.com/data');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = curl_exec($ch);
curl_close($ch);

// Process the retrieved data
// For example, you can store it in a database or file

// Example of storing data in a file
file_put_contents('data.txt', $data);
?>
```

Remember to set up a cron job on your server to run this PHP script at regular intervals.