Issue with GET arduino to Mysql

Hello,
I have an issue and it's been a week but a can't solve it so here's my question. I have to send several mesure to a Mysql database and when i start the card everething is working and data are send to the database but these data are all at 0.

Here's my code :

#include <Dhcp.h>
#include <Dns.h>
#include <Ethernet.h>
#include <EthernetClient.h>
#include <EthernetServer.h>
#include <EthernetUdp.h>
#include <Wire.h> //I2C needed for sensors
#include "SparkFunMPL3115A2.h" //Pressure sensor - Search "SparkFun MPL3115" and install from Library Manager
#include "SparkFunHTU21D.h" //Humidity sensor - Search "SparkFun HTU21D" and install from Library Manager

byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x11, 0xAC }; //physical mac address
char server[] = "**********.000webhostapp.com";   
IPAddress ip(********);
EthernetClient client;

MPL3115A2 myPressure; //Create an instance of the pressure sensor
HTU21D myHumidity; //Create an instance of the humidity sensor

//Hardware pin definitions
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
const byte STAT_BLUE = 7;
const byte STAT_GREEN = 8;
const byte RAIN = 2;

const byte REFERENCE_3V3 = A3;
const byte LIGHT = A1;
const byte BATT = A2;
const byte WDIR = A0;

//Global Variables
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
long lastSecond; //The millis counter to see when a second rolls by
// temps minimum entre deux requêtes
const long updateInterval = 10000;
// mémorise l'état de la connexion entre deux tours de loop
bool etaitConnecte = false;
long derniereRequete = 0;
volatile float rainHour[60]; //60 floating numbers to keep track of 60 minutes of rain
volatile unsigned long raintime, rainlast, raininterval, rain;
volatile float dailyrainin = 0; // [rain inches so far today in local time]
char carlu = 0;






void rainIRQ()
// Count rain gauge bucket tips as they occur
// Activated by the magnet and reed switch in the rain gauge, attached to input D2
{
    raintime = millis(); // grab current time
    raininterval = raintime - rainlast; // calculate interval between this and last event

    if (raininterval > 10) // ignore switch-bounce glitches less than 10mS after initial edge
    {
        dailyrainin += 0.011; //Each dump is 0.011" of water
        rainHour[60] += 0.011; //Increase this minute's amount of rain

        rainlast = raintime; // set up for next event
    }
}

float get_light_level()
{
  float operatingVoltage = analogRead(REFERENCE_3V3);

  float lightSensor = analogRead(LIGHT);

  operatingVoltage = 3.3 / operatingVoltage; //The reference voltage is 3.3V

  lightSensor = operatingVoltage * lightSensor;

  return (lightSensor);
}

int get_wind_direction()
{
    unsigned int adc;

    adc = analogRead(WDIR); 

  

    if (adc < 380) return (113);
    if (adc < 393) return (68);
    if (adc < 414) return (90);
    if (adc < 456) return (158);
    if (adc < 508) return (135);
    if (adc < 551) return (203);
    if (adc < 615) return (180);
    if (adc < 680) return (23);
    if (adc < 746) return (45);
    if (adc < 801) return (248);
    if (adc < 833) return (225);
    if (adc < 878) return (338);
    if (adc < 913) return (0);
    if (adc < 940) return (293);
    if (adc < 967) return (315);
    if (adc < 990) return (270);
    return (-1); 
}



void setup()
{
  Serial.begin(9600);
   char erreur = 0;
  // On démarre le shield Ethernet SANS adresse IP (donc donnée via DHCP)
  erreur = Ethernet.begin(mac);

  if (erreur == 0) {
    Serial.println("Parametrage avec ip fixe...");
    // si une erreur a eu lieu cela signifie que l'attribution DHCP
    // ne fonctionne pas. On initialise donc en forçant une IP
    Ethernet.begin(mac, ip);
  }
  Serial.println("Init...");
  // Donne une seconde au shield pour s'initialiser
  delay(1000);
  Serial.println("Pret !");

  pinMode(STAT_BLUE, OUTPUT); //Status LED Blue
  pinMode(STAT_GREEN, OUTPUT); //Status LED Green

  pinMode(REFERENCE_3V3, INPUT);
  pinMode(LIGHT, INPUT);
  pinMode(RAIN, INPUT_PULLUP); // input from wind meters rain gauge sensor
 
  pinMode(WDIR, INPUT);

  //Configure the pressure sensor
  myPressure.begin(); // Get sensor online
  myPressure.setModeBarometer(); // Measure pressure in Pascals from 20 to 110 kPa
  myPressure.setOversampleRate(7); // Set Oversample to the recommended 128
  myPressure.enableEventFlags(); // Enable all three pressure and temp event flags

  //Configure the humidity sensor
  myHumidity.begin();

  lastSecond = millis();
// attach external interrupt pins to IRQ functions
  attachInterrupt(0, rainIRQ, FALLING);



  
}

void loop()
{

   float temp = myHumidity.readTemperature();
   float pression = myPressure.readPressure();
   float light = get_light_level();
   float wind = get_wind_direction();
   float rain = 0;
   float humidite = myHumidity.readHumidity();
   for(int i = 0 ; i < 60 ; i++)
        rain += rainHour[i];
  
  // on lit les caractères s'il y en a de disponibles
  if(client.available()) {
    carlu = client.read();
    Serial.print(carlu);
  }

  
  if (etaitConnecte && !client.connected()) {
    Serial.println();
    Serial.println("Deconnexion !");
    // On ferme le client
    client.stop();
  }

  // Si on est déconnecté
  // et que cela fait plus de xx secondes qu'on a pas fait de requête
  if(!client.connected() && ((millis() - derniereRequete) > updateInterval)) {
    requete();
  }

  // enregistre l'état de la connexion (ouvert ou fermé)
  etaitConnecte = client.connected();
  




}

void requete() {

   
  
  char erreur = client.connect(server, 80);
    

  if(erreur == 1) {
    
      // Pas d'erreur ? on continue !
      Serial.println("Connexion OK, envoi en cours...");

      // On construit l'en-tête de la requête
      client.println("GET /add.php? HTTP/1.1");
      client.print("winddir=");
      client.print(wind);
      client.print("&humidity=");
      client.print(humidite);
      client.print("&tempf=");
      client.print(temp);
      client.print("&rainin=");
      client.print(rain);
      client.print("&dailyrainin=");
      client.print(dailyrainin);
      client.print("&pressure=");
      client.print(pression);
      client.print("light_lvl=");
      client.print(light);
      client.println( "Content-Type: application/x-www-form-urlencoded" );
      client.println("Host: *******.000webhostapp.com");
      client.println("Connection: close");
       client.println();
            


      // On enregistre le moment d'envoi de la dernière requête
      derniereRequete = millis();
  } else {
    // La connexion a échoué :(
    // On ferme notre client
    client.stop();
    // On avertit l'utilisateur
    Serial.println("Echec de la connexion");
    switch(erreur) {
      case(-1):
        Serial.println("Time out");
        break;
      case(-2):
        Serial.println("Serveur invalide");
        break;
      case(-3):
        Serial.println("Tronque");
        break;
      case(-4):
        Serial.println("Reponse invalide");
        break;
    }
  }
}

My php :

<?php include_once('database/init.php'); ?>
<!DOCTYPE html
<html>
       <head class="header">
        <meta charset="utf-8" />
	 <meta http-equiv= "refresh" content="86400"/>
	<link rel="stylesheet" href="Projetcss.css" />
	<title>Projet Station</title>
 </head>

 <body class="wallpaper"> 
 <?php
   
		

 $requete = $connexion->prepare('INSERT INTO station_meteo(winddir, humidity, tempf, rainin, dailyrainin, pressure,light_lvl) VALUES(:winddir, :humidity, :tempf, :rainin, :dailyrainin, :pressure, :light_lvl)');
 $requete->execute(array(
	'winddir' => $_GET['winddir'] = floatval($_GET['winddir']),
	'humidity' => $_GET['humidity'] = floatval($_GET['humidity']),
	'tempf' => $_GET['tempf'] = floatval($_GET['tempf']),
	'rainin' => $_GET['rainin'] = floatval($_GET['rainin']),
	'dailyrainin' => $_GET['dailyrainin'] = floatval($_GET['dailyrainin']),
	'pressure' => $_GET['pressure'] = floatval($_GET['pressure']),
        'light_lvl' => $_GET['light_lvl'] = floatval($_GET['light_lvl']),
	));

echo 'data send';
?>

   
 </body>
</html> </body>
</html>

I dont think you need to set the content-type for a simple GET request.

You could log $_SERVER['QUERY_STRING'] somewhere in your PHP script so you can check the query string is being sent properly. see Display a Query String Value on a Web Page | PHP Reference Book Blog. Or check the httpd logs on your webhost.