it is possible to fetch info or description from wikipedia by using xml.
       $url = "http://en.wikipedia.org/w/api.php?action=opensearch&search=".$term."&format=xml&limit=1";
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_HTTPGET, TRUE);
        curl_setopt($ch, CURLOPT_POST, FALSE);
        curl_setopt($ch, CURLOPT_HEADER, false);   // Include head as needed
        curl_setopt($ch, CURLOPT_NOBODY, FALSE);        // Return body
        curl_setopt($ch, CURLOPT_VERBOSE, FALSE);           // Minimize logs
        curl_setopt($ch, CURLOPT_REFERER, "");            // Referer value
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);    // No certificate
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);     // Follow redirects
        curl_setopt($ch, CURLOPT_MAXREDIRS, 4);             // Limit redirections to four
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);     // Return in string
        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 6.1; he; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8");   // Webbot name
        $page = curl_exec($ch);
        $xml = simplexml_load_string($page);
        if((string)$xml->Section->Item->Description) {
            print_r(array((string)$xml->Section->Item->Text, 
            (string)$xml->Section->Item->Description, 
            (string)$xml->Section->Item->Url));
        } else {
            echo "sorry";
        } 
But curl must be install on server... have a nice day...