php - "Warning: curl_setopt(): and Fatal error: " in push notification -

am trying implement push notification using php. code follows,

file 1: push.php

<?php  // server file class pushnotifications {     // (android)api access key google api's console.     private static $api_access_key = 'aizasydg3fyaj1uw7vb-wejamjyjxio5jagasyi';     // (ios) private key's passphrase.     private static $passphrase = 'joashp';     // (windows phone 8) name of our push channel.         private static $channelname = "joashp";      // change above 3 vriables per app.     public function __construct() {         exit('init function not allowed');     }          // sends push notification android users     public function android($data, $reg_id) {             $url = 'https://android.googleapis.com/gcm/send';             $message = array(                 'title' => $data['mtitle'],                 'message' => $data['mdesc'],                 'subtitle' => '',                 'tickertext' => '',                 'msgcnt' => 1,                 'vibrate' => 1             );              $headers = array(                 'authorization: key=' .self::$api_access_key,                 'content-type: application/json'             );              $fields = array(                 'registration_ids' => array($reg_id),                 'data' => $message,             );              return self::usecurl($url, json_encode($headers), json_encode($fields));          }      // sends push's toast notification windows phone 8 users     public function wp($data, $uri) {         $delay = 2;         $msg =  "<?xml version=\"1.0\" encoding=\"utf-8\"?>" .                 "<wp:notification xmlns:wp=\"wpnotification\">" .                     "<wp:toast>" .                         "<wp:text1>".htmlspecialchars($data['mtitle'])."</wp:text1>" .                         "<wp:text2>".htmlspecialchars($data['mdesc'])."</wp:text2>" .                     "</wp:toast>" .                 "</wp:notification>";          $sendedheaders =  array(             'content-type: text/xml',             'accept: application/*',             'x-windowsphone-target: toast',             "x-notificationclass: $delay"         );          $response = $this->usecurl($uri, $sendedheaders, $msg);          $result = array();         foreach(explode("\n", $response) $line) {             $tab = explode(":", $line, 2);             if (count($tab) == 2)                 $result[$tab[0]] = trim($tab[1]);         }          return $result;     }          // sends push notification ios users     public function ios($data, $devicetoken) {         $devicetoken = $devicetoken;         $ctx = stream_context_create();         // ck.pem certificate file         stream_context_set_option($ctx, 'ssl', 'local_cert', 'ck.pem');         stream_context_set_option($ctx, 'ssl', 'passphrase', self::$passphrase);         // open connection apns server         $fp = stream_socket_client(             'ssl://gateway.sandbox.push.apple.com:2195', $err,             $errstr, 60, stream_client_connect|stream_client_persistent, $ctx);         if (!$fp)             exit("failed connect: $err $errstr" . php_eol);         // create payload body         $body['aps'] = array(             'alert' => array(                 'title' => $data['mtitle'],                 'body' => $data['mdesc'],              ),             'sound' => 'default'         );         // encode payload json         $payload = json_encode($body);         // build binary notification         $msg = chr(0) . pack('n', 32) . pack('h*', $devicetoken) . pack('n', strlen($payload)) . $payload;         // send server         $result = fwrite($fp, $msg, strlen($msg));          // close connection server         fclose($fp);         if (!$result)             return 'message not delivered' . php_eol;         else             return 'message delivered' . php_eol;     }      // curl      private function usecurl($url, $headers, $fields) {             // open connection             $ch = curl_init();             if ($url) {                 // set url, number of post vars, post data                 curl_setopt($ch, curlopt_url, $url);                 curl_setopt($ch, curlopt_post, true);                 curl_setopt($ch, curlopt_httpheader, $headers);                 curl_setopt($ch, curlopt_returntransfer, true);                  // disabling ssl certificate support temporarly                 curl_setopt($ch, curlopt_ssl_verifypeer, false);                 if ($fields) {                     curl_setopt($ch, curlopt_postfields, $fields);                 }                  // execute post                 $result = curl_exec($ch);                 if ($result === false) {                     die('curl failed: ' . curl_error($ch));                 }                  // close connection                 curl_close($ch);                  return $result;         }     }  } ?> 

file 2 : test.php

<?php         require_once('push.php');     // message payload     $msg_payload = array (         'mtitle' => 'test push notification title',         'mdesc' => 'test push notification body',     );      // android     $regid = 'apa91bhdommhiro5jjrm1jvxmgqhcomcpvfdqbcpflvvaiehefi9wvrwodevvd1npz82rv2dxcyvv-omml5cjphvxnlrzkiacr99eq_irryogy7typhqdb5sg4nb8zn6rfpibuiknuwdqzr-2abv6gl_vwdzljof4w';     // ios     $devicetoken = 'fe66489f304dc75b8d6e8200dff8a456e8daeacec428b427e9518741c92c6660';     // wp8     $url = 'http://s.notify.live.net/u/1/sin/hmqaaad1xjmxfq8sr0b580ncxiod6g7hiyp9ohvjjpmc2eta7u_xy_xtsah8twx7dul2azlhqoyzssq8jqrq-pqlatkw/d2luzg93c3bob25lzgvmyxvsda/ekts2gmt5bg_gb8lkdn_rg/wuhpybv02famb7tjuff7dg9aul4';      // replace above variable values           pushnotifications::android($msg_payload, $regid);          pushnotifications::wp8($msg_payload, $url);          pushnotifications::ios($msg_payload, $devicetoken); ?> 

but getting error as,

warning: curl_setopt(): must pass either object or array curlopt_httpheader argument in g:\xampp\htdocs\push_notification\pushnotifications.php on line 115  fatal error: call undefined method pushnotifications::wp8() in g:\xampp\htdocs\push_notification\testnotifications.php on line 21 

what should done rectify error , push notification? pls help. thank you.