conta número de tweets que um determinado link teve

Tweet Count

<?php
/*
 * usage: echo tweetCount('http://google.com');
 * ref: http://www.phpsnippets.info/get-how-many-times-a-page-have-been-retweeted-using-php
 */
function tweetCount($url) {
    $content = file_get_contents("http://api.tweetmeme.com/url_info?url=".$url);
    $element = new SimpleXmlElement($content);
    $retweets = $element->story->url_count;
    if($retweets){
        return $retweets;
    } else {
        return 0;
    }
}
?>