Description:
------------
I am running with PHP 5.4.33

Input variables is less than the limit, but always prompt me input variables exceed.

I extended to 10000, but still the same.

Array
(
    [type] => 2
    [message] => Unknown: Input variables exceeded 10000. To increase the limit change max_input_vars in php.ini.
    [file] => Unknown
    [line] => 0
)


RAW data to submit:
-------------------

POST:
Array
(
    [username] => user
    [password] => password
    [additional] => {"appName":"app","cicd":"","clientIP":"10.1.1.170","clientMac":"10:16:9e:8d:aa:12","clientName":"Asus K012","clientPlatform":"Jelly Bean,4.3","clientTyp":"MA"}
    [api_Key] => 4ruOFVi94rFKYjEeeDeWAq/kYAZinqbi90KeoJYh2SNVL95GbYO8rDaP7g4N1w6L
    [token] => {ieZivx5HZII=}{070YNK2R4bM=}{L1bXW5MgaM}{MzQ2c3BtbTltdTV1M2NsMTdybGtmbWU3ZTc=}{}
    [from_datetime] => 
)


Why?

Test script:
---------------
$fields = array(
                "username"=>$_POST['userid'],
                "password"=>$_POST['passwd'],
                "api_Key"=>"4ruOFVi94rFKYjEeeDeWAq/kYAZinqbi90KeoJYh2SNVL95GbYO8rDaP7g4N1w6L",
                "additional"=>Array("appName"=>"app","cicd"=>"","clientIP"=>"10.1.1.170","clientMac"=>"10:16:9e:8d:aa:12","clientName"=>"Asus K012", "clientPlatform"=>"Jelly Bean,4.3", "clientTyp"=>"MA"),
                "token"=>$_POST['token'],
                "from_datetime"=>$_POST['from_datetime']
            );


$fields_string = "";
  foreach($fields as $key=>$value) {
    if(is_array($value)){
      $fields_string .= urldecode(http_build_query(array($key => $value)));
    }else{
      $fields_string .= $key.'='.$value.'&';
    }

  }
  
  rtrim($fields_string,'&');
  
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_POST, count($fields));
  curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
  curl_setopt($ch, CURLOPT_HEADER, 0); // DO NOT RETURN HTTP HEADERS
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // RETURN THE CONTENTS OF THE CALL
  curl_exec($ch);
  curl_close($ch);