function to fetch description of a keyword from wikipedia. http://stackoverflow.com/a/13132388

gistfile1.txt

function getDescription($keyword){
    $url='http://lookup.dbpedia.org/api/search.asmx/KeywordSearch?QueryString='.urlencode($keyword).'&MaxHits=1';
    $xml=simplexml_load_file($url);
    return $xml->Result->Description;
}
echo getDescription('agra');