PHP – urban aircraft push: response: negative response from server: 0

I'm trying to send a push notification from my server to my Android application. But it's throwing an error. Payload: {"audience": "all", "notification": {"Android": {"alert": "PHP script test"}}, "device_types": ["Android"]} response: got a negative reply from the server: 0

The following is the source code

<?PHP
  define('APPKEY','**************Mw'); // Your App Key
  define('PUSHSECRET','**********Low'); // Your Master Secret
  define('PUSHURL', 'https://go.urbanairship.com/api/push/');

  $contents = array();
  $contents['alert'] = "PHP script test";
  $notification = array();
  $notification['android'] = $contents;
  $platform = array();
  array_push($platform, "android");

  $push = array("audience"=>"all", "notification"=>$notification, "device_types"=>$platform);

  $json = json_encode($push);
  echo "Payload: " . $json . "\n"; //show the payload

  $session = curl_init(PUSHURL);
  curl_setopt($session, CURLOPT_USERPWD, APPKEY . ':' . PUSHSECRET);
  curl_setopt($session, CURLOPT_POST, True);
  curl_setopt($session, CURLOPT_POSTFIELDS, $json);
  curl_setopt($session, CURLOPT_HEADER, False);
  curl_setopt($session, CURLOPT_RETURNTRANSFER, True);
  curl_setopt($session, CURLOPT_HTTPHEADER, array('Content-Type:application/json', 'Accept: application/vnd.urbanairship+json; version=3;'));
 $content = curl_exec($session);
 echo "Response: " . $content . "\n";

 // Check if any error occured
 $response = curl_getinfo($session);
 if($response['http_code'] != 202) {
 echo "Got negative response from server: " . $response['http_code'] . "\n";
  } else {

 echo "Wow, it worked!\n";
 }

 curl_close($session);

?>

I tried to run this PHP script from my browser. The push notification from the city airship server works normally

Thanks for any help in advance

resolvent:

<?PHP
// DEVELOPMENT PUSH DETAILS
define('APPKEY','XXXXXXXXXXXXXXXXXXX'); 
define('PUSHSECRET', 'XXXXXXXXXXXXXXXXXXX'); // Master Secret
define('PUSHURL', 'https://go.urbanairship.com/api/push/'); 
/*
// PRODUCTION PUSH DETAILS
define('APPKEY','XXXXXXXXXXXXXXXXXXX'); 
define('PUSHSECRET', 'XXXXXXXXXXXXXXXXXXX'); // Master Secret
define('PUSHURL', 'https://go.urbanairship.com/api/push/'); 
*/  

$push = array();

$push['aliases'] = $aliases;    // Using alias that is set from the javascript after the device has registered to urban airship
$push['aps'] = array("badge"=>"+1", "alert" => $message);   // for iphone
$push['android'] = array("alert"=>$message);    // for android

$json = json_encode($push); 

echo "Payload: " . $json . "\n"; //show the payload

$session = curl_init(PUSHURL); 

curl_setopt($session, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($session, CURLOPT_USERPWD, APPKEY . ':' . PUSHSECRET); 
curl_setopt($session, CURLOPT_POST, True); 
curl_setopt($session, CURLOPT_POSTFIELDS, $json); 
curl_setopt($session, CURLOPT_HEADER, False); 
curl_setopt($session, CURLOPT_RETURNTRANSFER, True); 
curl_setopt($session, CURLOPT_HTTPHEADER, array('Content-Type:application/json')); 

$content = curl_exec($session); // $content has all the data that came back from urban airship..check its contents to see if successful or not.


// Check if any error occured 
$response = curl_getinfo($session); 

if($response['http_code'] != 200) { 
    $status = $response['http_code']; 
            echo "Got negative response from server: " . $response['http_code'] . "\n";
} else { 
    $status = 'ok';
} 

curl_close($session);

?>

Here, $aliases is an array type. It is a list of aliases. $message is the notification you want to push. Assign values correctly in these two variables. It will work