Arduino & PHP query

我是arduino和PHP的新手，我试图将arduino uno的温度和湿度读数与以太网屏蔽发送到PHP网页，然后从PHP网页控制风扇，一些阀门等。我的第一个问题是我不能得到温度读数实际显示在PHP网页上。请参阅附件arduino代码和PHP代码。我将非常感谢任何关于这方面的帮助或建议。

Arduino代码:

#include <Ethernet.h>           //library for ethernet functions
#include <SPI.h>
#include <Client.h>             //library for client functions

// Ethernet settings
byte mac[] = {0x90,0xA2,0xDA,0x0D,0x8B,0xB3};  //Replace with your Ethernet shield MAC
byte ip[] = { 192,168,1,105};  //The Arduino device IP address
byte subnet[] = { 255,255,255,0};
byte gateway[] = { 192,168,0,1};
IPAddress server(192,168,1,110);        // IP-adress of server arduino sends data to
EthernetClient client;
bool connected = false;
int sensorInPin = 0;
float temperature = 0;
void setup(void)
{
Serial.begin(9600);
Serial.println("Initializing Ethernet.");
delay(1000);
Ethernet.begin(mac);
Serial.println("LM35 Sensor ");
analogReference(INTERNAL);

}
void printTenths(int value)
{
// prints a value of 123 as 12.3
Serial.print(value / 100);
Serial.print(".");
Serial.println(value % 10);
}
void loop(void)
{

int span = 20;
int aRead = 0;
for (int i = 0; i < span; i++)
{
    aRead = aRead+analogRead(sensorInPin);
}
aRead = aRead / 20;
temperature =((100*1.1*aRead)/99)*10;
if(!connected)
{
    Serial.println("Not connected");
    if (client.connect(server,80))
    {
        connected = true;
        //int temp = analogRead(A1);
        Serial.print("Temp is ");
        Serial.println(temperature);
        Serial.println();
        Serial.println("Sending to Server: ");
        client.print("GET /index.php?t0=");
        Serial.print("GET /index.php?t0=");
        client.print(temperature);
        Serial.print(temperature);
        Serial.println();
        client.println();
        client.println("HTTP/1.1'r'n");
        Serial.println();
        Serial.println("HTTP/1.1'r'n");
        client.println("Host: localhost'r'n");
        Serial.println("Host: localhost'r'n");
        client.println();
        client.println("User-Agent: Arduino'r'n");
        Serial.println("User-Agent: Arduino'r'n");
        client.println("Accept: text/html'r'n");
        Serial.println("Accept: text/html'r'n"); 
        client.println();
        Serial.println();
        delay(1000);
    }
    else
    {
        Serial.println("Cannot connect to Server");
    }
  }
  else
  {
    delay(1000);
    while (client.connected() && client.available())
    {
        char c = client.read();
        Serial.print(c);

    }
    Serial.println();
    client.stop();
    connected = false;
    }
 }

  <?php
  echo date("d.m.Y-H:i:s") . " Temperature= " . $_GET['t0']; 
  ?>