根据sdk的php调用

$fileName = public_path()."public\\face\\13826522856-1.jpg";

$imgData = $this->imgBase64Encode($fileName);

//echo "base64=".$imgData."
";

$object = new AipFace($this->appId,$this->apiKey,$this->secretKey);

$result = $object->match(array($imgData));

var_dump($result);

返回如下：

array(6) { ["error_code"]=> int(222200) ["error_msg"]=> string(34) "request body should be json format" ["log_id"]=> int(535897925101) ["timestamp"]=> int(1586182650) ["cached"]=> int(0) ["result"]=> NULL }

怎么会提示这个错误呢，sdk是最新的啊