$cache_file = "/path/to/cache_file.htm";
$force_update = false;
 
if (filemtime($cache_file)+600 < time() || $force_update) {
 
	ob_start();
 
	$username = "YOUR_USER_NAME";
	$api_key = "YOUR_API_KEY";
 
	$url = "http://ws.audioscrobbler.com/2.0/?format=json&method=user.getrecenttracks&";
	$url .= "user=" . $username . "&api_key=" . $api_key;
 
	$data = @curlContents($url);
	$data = @json_decode($data, true);
 
	if (isset($data['recenttracks']['track'])) {
		echo '<ul>' . "\n";
		foreach ($data['recenttracks']['track'] as $track) {
			echo '<li>' . $track['artist']['#text'] . ' - ' . $track['name'] . '</li>' . "\n";
		}
		echo '</ul>' . "\n";
	}
 
	$contents = ob_get_contents();
	ob_end_clean();
 
	file_put_contents($cache_file, $contents);
 
}
 
else {
	$contents = file_get_contents($cache_file);
}
 
echo $contents;