/*
 * author:kai
 * $return token
 * 功能：获取阿里云token
 */
public function getalyuntoken($accesskeyid,$accessKeysecret){
    date_default_timezone_set("Etc/GMT");
    $one = md5(time());
    $parms = array(
        "AccessKeyId" => $accesskeyid,
        "Action" => "CreateToken",
        "Version" => "2019-02-28",
        "Format" => "JSON",
        "RegionId" => "cn-shanghai",
        "Timestamp" => date("Y-m-d\TH:i:s\Z"),
        "SignatureMethod" => "HMAC-SHA1",
        "SignatureVersion" => "1.0",
        "SignatureNonce" => substr($one,0,8)."-".substr($one,8,4)."-".substr($one,12,4)."-".substr($one,16,4)."-".substr($one,20,4),

    );
    ksort($parms);
    $query = http_build_query($parms);
    $stringToSign = "GET&%2F&" . urlencode($query);
    $signature = urlencode(base64_encode(hash_hmac("sha1",$stringToSign,$accessKeysecret."&",true)));
    $queryStringWithSign = "Signature=". $signature ."&". $query;
    $tokenUrl = "http://nls-meta.cn-shanghai.aliyuncs.com/?".$queryStringWithSign;
    $token_string = $this->urlOpen($tokenUrl);
    $token_object = json_decode($token_string,true);
    $token = $token_object['Token']['Id'];
    return $token;

}
/*
 * author：kai
 */
public function urlOpen($url,$data = null,$header =null){
    $ch =curl_init();
    curl_setopt($ch,CURLOPT_URL,$url);
    //curl_setopt($ch,CURLOPT_HTTPHEADER,$header);
    //curl_setopt($ch,CURLOPT_USERAGENT,$url,$ua);
    if($data){
        curl_setopt($ch,CURLOPT_POST,1);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$data);
    }
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch,CURLOPT_REFERER,$url);
    curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
    curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
    $content = curl_exec($ch);
    $error = curl_error($ch);
    if($error){
        die($error);
    }
    curl_close($ch);
    return $content;

}