/is',$content,$matches); } $contentText = isset($matches[1][0])?$matches[1][0]:'e1'; preg_match_all('/Citations<\/a><\/td>(\d+)<\/td>/is',$contentText,$matches); $citations = isset($matches[1][0])?$matches[1][0]:'e2'; preg_match_all('/h-index<\/a><\/td>(\d+)<\/td>/is',$contentText,$matches); $hindex = isset($matches[1][0])?$matches[1][0]:'e3'; preg_match_all('/