Queries the TweetMeme API to check for tweets about this url

tweetMeme()

<?php

// Queries the TweetMeme API to check for tweets about this url
// If no results, TweetMeme will create a story for this link
// Uses the get_url function: http://gist.github.com/370985
// Make sure you set the right permissions for you cache directory!

function tweetMeme($bloglink) {
// Set some vars:
	$tweetmemeAPI = 'http://api.tweetmeme.com/url_info?url=';
	$cache_dir = '/usr/local/www/cache/';
	$expire = 2; // hours
	$url = $tweetmemeAPI.$bloglink;
	$current_time = time();
	$expire_time = $expire * 60 * 60;
	$file = $cache_dir . 'twtmeme_' . md5($bloglink);
	if(!file_exists($file)) {
		file_put_contents($file, '');
	};
	$file_time = filemtime($file);
// If file exists, and when it's not expired, AND when it's not empty, return contents:
	if(file_exists($file) && ($current_time - $expire_time < $file_time) && file_get_contents($file) != '') {
		return file_get_contents($file);
	} else {
// Retrieve fresh content, parse XML and write to file (and log):
		$vars = new SimpleXMLElement(get_url($url));
		if (!$vars->story->url_count) {
			$tweetamount = '0';
			$content = $tweetamount;
			$content.= '<!-- cached: '.time().'-->';
		} else {
			$tweetamount = $vars->story->url_count;
			$memelink = $vars->story->tm_link;
			$content = '<a href="'.$memelink.'" target="_blank">'.$tweetamount.'</a>';
			$content.= '<!-- cached: '.time().'-->';
		}
		file_put_contents($file, $content);
// Optional, use for debugging / stats:
		error_log('Tweetmeme pinged for '.$bloglink.':: '.$content);
		return $content;
	};
};


?>