Wordpress Twitter Search API simple integration with 2 levels of wp transient caching for fallback

[Wordpress] Twitter Search API with WP Transient Caching

<?php //get tweets
function get_tweets($s) {
	$url = 'http://search.twitter.com/search.json?q=' . urlencode($s);
	//set up var for holding tweets
	$local_tweets = '';
	//check for cache from 5 minutes ago
	if(get_transient('bodyadorned_tweets_short')) {
		$local_tweets = get_transient('bodyadorned_tweets_short');
	//if it isn't found, try to update tweets
	} else {
		$ch = curl_init($url);
		curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);
		$json = curl_exec ($ch);
		curl_close ($ch);
		//if Twitter returned json
		if($json->results) {
			$json = json_decode($json);
			$counter = 0;
			//loop through it and output tweets
			foreach ($json->results as $entry) {
				$counter ++;
				if($counter < 20) {
					$text = trim($entry->text);
					$author = trim($entry->from_user);
					$id = $entry->id;
					$local_tweets .= '<article id="tweet-' . $id . '" class="tweet">' .
						'<p><strong>@' . $author . '</strong><br /> ' . $text . '</p>' .
						'</article>';
				} else {
					break;
				}
			}
			//reset our 5 min and 1 day caches
			set_transient('bodyadorned_tweets_long', $local_tweets, 60*60*24*1);
			set_transient('bodyadorned_tweets_short', $local_tweets, 60*5);
		//if Twitter didn't respond
		} else {
			//check for the 1 day cache
			if(get_transient('bodyadorned_tweets_long')) {
				$local_tweets = get_transient('bodyadorned_tweets_long');
			//if we can't find that, respond with an error message
			} else {
				$local_tweets = '<article class="tweet"><p><strong>No tweets at this time.</strong></p>';
			}
		}
	}
	return $local_tweets;
}

//show tweets
$tweets = get_tweets('#hashtag');
echo $tweets; ?>