问在PHP中使用Twitter搜索时出错

EN

 function twitter_class()
{
    $this->realNamePattern = '/\((.*?)\)/';


$this->intervalNames   = array('second', 'minute', 'hour', 'day', 'week', 'month', 'year');
$this->intervalSeconds = array( 1,        60,       3600,   86400, 604800, 2630880, 31570560);

    $this->badWords = array('somebadword', 'anotherbadword');
}
function searchURL($language, $query) {
    $func_args=func_get_args();
    $vars = array_map('urlencode', $func_args + array('', ''));        
    return vsprintf('http://search.twitter.com/search.atom?lang=%s&q=%s', $vars);
}

function getTweets($q,$lang, $limit=15)
{
    $output = '';

    // get the seach result

   $ch = curl_init($this->searchURL($lang, $q));


    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);

    $response = curl_exec($ch);

    if ($response !== FALSE)
    {
        $xml = simplexml_load_string($response);

        $output = '';
        $tweets = 0;

        for($i=0; $i<count($xml->entry); $i++)
        {
            $crtEntry = $xml->entry[$i];
            $account  = $crtEntry->author->uri;
            $image    = $crtEntry->link[1]->attributes()->href;
            $tweet    = $crtEntry->content;

            // skip tweets containing banned words
            $foundBadWord = false;
            foreach ($this->badWords as $badWord)
            {
                if(stristr($tweet, $badWord) !== FALSE)
                {
                    $foundBadWord = true;
                    break;
                }
            }

            $tweet = str_replace('<a href=', '<a target="_blank" href=', $tweet);

            // skip this tweet containing a banned word
            if ($foundBadWord)
                continue;

            // don't process any more tweets if at the limit
            if ($tweets==$limit)
                break;
            $tweets++;

            // name is in this format "acountname (Real Name)"
            preg_match($this->realNamePattern, $crtEntry->author->name, $matches);
            $name = $matches[1];

            // get the time passed between now and the time of tweet, don't allow for negative
            // (future) values that may have occured if server time is wrong
            $time = 'just now';
            $secondsPassed = time() - strtotime($crtEntry->published);

            if ($secondsPassed>0)
            {
                // see what interval are we in
                for($j = count($this->intervalSeconds)-1; ($j >= 0); $j--)
                {
                    $crtIntervalName = $this->intervalNames[$j];
                    $crtInterval = $this->intervalSeconds[$j];

                    if ($secondsPassed >= $crtInterval)
                    {
                        $value = floor($secondsPassed / $crtInterval);
                        if ($value > 1)
                            $crtIntervalName .= 's';

                        $time = $value . ' ' . $crtIntervalName . ' ago';

                        break;
                    }
                }
            }