php 封装 Twitter 访问的 PHP 类

封装 Twitter 访问的 PHP 类

class Twitter {

    /**
     * Method to make twitter api call for the users timeline in XML
     *
     * @access  private
     * @param   $twitter_id, $num_of_tweets
     * @return  $xml
     */
    private function api_call($twitter_id, $num_of_tweets) {
        $c  =   curl_init();

        curl_setopt($c, CURLOPT_URL, "http://twitter.com/statuses/user_timeline/$twitter_id.xml?count=$num_of_tweets");
        curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($c, CURLOPT_CONNECTTIMEOUT, 3);
        curl_setopt($c, CURLOPT_TIMEOUT, 5);

        $response       =   curl_exec($c);
        $response_info  =   curl_getinfo($c);

        curl_close($c);

        if (intval($response_info['http_code']) == 200) {
            $xml    =   new SimpleXMLElement($response);

            return $xml;
        } else {
            return false;
        }
    }

    /**
     * Method to add hyperlink html tags to any urls, twitter ids or hashtags in tweet
     *
     * @access  private
     * @param   $text
     * @return  $text
     */
    private function process_links($text) {
        $text   =   utf8_decode($text);
        $text   =   preg_replace('@(https?://([-\w\.]+)+(d+)?(/([\w/_\.]*(\?\S+)?)?)?)@', '<a href="$1">$1</a>',  $text);
        $text   =   preg_replace("#(^|[\n ])@([^ \"\t\n\r<]*)#ise", "'\\1<a href=\"http://www.twitter.com/\\2\" >@\\2</a>'", $text);  
        $text   =   preg_replace("#(^|[\n ])\#([^ \"\t\n\r<]*)#ise", "'\\1<a href=\"http://hashtags.org/search?query=\\2\" >#\\2</a>'", $text);

        return $text;
    }

    /**
     * Main method to retrieve the tweets and return html for display
     *
     * @access  public
     * @param   $twitter_id, $num_of_tweets, $timezone
     * @return  $result
     */
    public function get_tweets($twitter_id, $num_of_tweets = 3, $timezone = "America/Denver") {
        $include_replies    =   false;

        date_default_timezone_set($timezone);

        // the html markup
        $cont_o     =   "<div id=\"tweets\">\n";

        $tweet_o    =   "<div class=\"status\">\n";
        $tweet_c    =   "</div>\n\n";

        $detail_o   =   "<div class=\"details\">\n";
        $detail_c   =   "</div>\n\n";

        $cont_c     =   "</div>\n";

        if ($twitter_xml = $this->api_call($twitter_id, $num_of_tweets)) {
            $result     =   $cont_o;

            foreach ($twitter_xml->status as $key => $status) {
                if ($include_replies == true | substr_count($status->text, "@") == 0 | strpos($status->text, "@") != 0) {
                    $tweet  =   $this->process_links($status->text);

                    $result .=  $tweet_o . $tweet . $tweet_c . $detail_o . date('D jS M y H:i', strtotime($status->created_at)) . $detail_c;
                }
            }

            $result     .=  $cont_c;
        } else {
            $result     .=  $cont_o . $tweet_o . "Twitter seems to be unavailable at the moment." . $tweet_c . $cont_c;
        }

        return $result;
    }

}