getting data from arduino and stored in database through ethienet

[admin]

I am getting data from arduino and stored in database through ethienet. But when i got value ambientemp from arduino. it showed correct value when i tested on serial monitor. but when I use sprintf() I got -3275 or 0 value, which it is not correct value. Here is my partial code in sketch, please help...Here is guy doing his project. The result on Sketch serial montior is: ambientTemp 23.55 and then GET /getData/temp.php?t=-3278 I copied some of him: <a href="http://scouris.wordpress.com/2010/09/10/temperature-sensing-with-arduino-php-and-jquery/#more-27" rel="nofollow">getting data and stored it into mysql</a>

void getData() {
  double ambientTemp=23.55; //to make it easy I assign ambientTemp a value.
unsigned long previousMillis = 0;
unsigned long currentMillis = 0;
long interval = 10000; 
  char strURL[70];


   EthernetClient client;
  // If there's a successful connection, send the HTTP POST request
   currentMillis = millis();
  if(currentMillis - previousMillis > interval) {
    previousMillis = currentMillis;

  if (client.connect(server, 80)) {
    Serial.println("get data connecting...");

    //client.println("GET /getData/temp.php?t=%d,temp HTTP/1.1");
   // delay(10000);
     Serial.println("ambientTemp");
  Serial.println(ambientTemp);
    sprintf(strURL,"GET /getData/temp.php?t=%d",ambientTemp);
    delay(50000);

    client.print(strURL);
    client.println();
   // client.print(strURL);
    Serial.print(strURL);



  } 
  else {
    // If you couldn't make a connection:
    Serial.println("Connection failed");
    Serial.println("Disconnecting.");
    client.stop();
  }
}
}