Has anyone used RequestsforPHP?

{Code...} caught with fiddler above. below is my code {code...} below is the running result {code...}. Why is it not all displayed?

POST http://10.18.32.78/nps/login.action HTTP/1.1Host: 10.18.32.78User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3Accept-Encoding: gzip, deflateReferer: http://10.18.32.78/nps/login_view.action;jsessionid=9DC8C0E7A12FF26279DB8123088C6DC6Cookie: JSESSIONID=9DC8C0E7A12FF26279DB8123088C6DC6Connection: keep-aliveContent-Type: application/x-www-form-urlencodedContent-Length: 34userName=092312123&password=123456

The above was captured using fiddler.
Below is my code

require './Requests-1.6.0/library/Requests.php';Requests::register_autoloader();$url = 'http://10.18.32.78/nps/login.action';$headers = array(    'Host' => '10.18.32.78',    'User-Agent' => 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0',    'Accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',    'Accept-Language' => 'zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',    'Accept-Encoding' => 'gzip, deflate',    'Referer' => 'http://10.18.32.78/nps/login_view.action;jsessionid=9DC8C0E7A12FF26279DB8123088C6DC6',    'Cookie' => 'JSESSIONID=9DC8C0E7A12FF26279DB8123088C6DC6',    'Connection' => 'keep-alive',    'Content-Type' => 'application/x-www-form-urlencoded',    'Content-Length' => '34');//var_dump($headers);$options = array();$data = array(    ''=>'userName=092312123&password=123456');// Now let's make a request!$request = Requests::post($url, $headers, $data);

The running result is as follows:

String'    Neusoft ruidao ruiding teaching and training platform-