あるURLの はてブ数 とか ツイート数 とか いいネ！数 とか を調べたり 表示したり

<?php
class SocialCounter {

  public static function getHatebu($url) {
    $count = 0;
    $url = 'http://b.hatena.ne.jp/bc/' . $url;
    $fp = fopen($url, 'r');
    $meta_data = stream_get_meta_data($fp);
    foreach ($meta_data['wrapper_data'] as $header) {
      if (preg_match("/Location:.*\/([0-9]+)\.gif/", $header, $matches)) {
        $count = $matches[1] + 0;
      }
    }
    return $count;
  }

  public static function getTweet($url) {
    $count = 0;
    $url = 'http://urls.api.twitter.com/1/urls/count.json?url=' . $url;
    $res = file_get_contents($url);
    $j = json_decode($res);
    if (!is_null($j->count) && preg_match('/^[0-9]+$/', $j->count)) {
      $count = $j->count + 0;
    }
    return $count;
  }

  public static function getFbLike($url) {
    $count = 0;
    $url = 'http://api.facebook.com/restserver.php?method=links.getStats&urls=' . $url;
    $res = file_get_contents($url);
    if (strlen($res) > strlen("link_stat/total_count")*2) {
      $xml = simplexml_load_string($res);
      if (!is_null($xml->link_stat) && !is_null($xml->link_stat->total_count)) {
        $count = $xml->link_stat->total_count->__toString() + 0;
      }
    }
    return $count;
  }

  /**
   * @deprecated 取得方法不明
   */
  public static function getGplus1($url) {}
}

使い方

<?php
$url = "http://d.hatena.ne.jp/tottokug/20120105/1325753189";
$hatebu = SocialCounter::getHatebu($url);
var_dump($hatebu);
$tweet = SocialCounter::getTweet($url);
var_dump($tweet);
$like = SocialCounter::getFbLike($url);
var_dump($like);