弹性web托管里的curl功能

function doCurlGetRequest($url, $data = array(), $timeout = 10) {

    if($url == "" || $timeout <= 0){
        return false;
    }
    if($data != array()) {
        $url = $url . '?' . http_build_query($data);
        // echo $url;
    }
        
    $con = curl_init((string)$url);
    curl_setopt($con, CURLOPT_HEADER, false);
    curl_setopt($con, CURLOPT_RETURNTRANSFER,true);
    curl_setopt($con, CURLOPT_TIMEOUT, (int)$timeout);

    return curl_exec($con);
}

请问这段代码有什么问题？在运行时出现Resource id #2错误信息