Send data from Python to PHP script - php

Question

I want to do an HTTP GET request from the Python script to my server. The data I want to send is stored in a variable data.
I am using requests package of python to send it to my PHP page and I am getting the following error
import requests
data=850
r=requests.get("http://xxxxx.org/retrieve.php", params= str(data))
my retrieve.php file is
<?php
if (isset($_GET['data'])){
$data = $_GET['data'];
echo $data;
}
else{
echo "Data not received";
}
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "databasename";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$f=0;
$data= intval(data);
$sql="select max(ID) from moisture";
$res1 = mysqli_query($conn,$sql);
$row = mysqli_fetch_row($res1);
$ref = $row[0] + 1;
$sql1 = "INSERT INTO moisture VALUES ('$ref' , '$data')";
if (mysqli_query($conn, $sql1))
{
$f=1;
}
else {
$f=0;
}
mysqli_close($conn);
?>
I converted the data to string and then send it. On php script, I am getting the intval of the string but it is storing value '0' instead of '850'

Answer 1

My code is working for any static value that I am assigning to it. But it is not sending the data if I am receiving it from the sensor.
import serial
import requests
ser=serial.Serial('COM12',9600)
while True:
data=ser.readline()
r=requests.get("http://xxxxx.org/retrieve.php", params= data)