Can't update arduino value to xampp database from link - php

Question

I got the tutorial from this link
https://icreateproject.info/2014/12/14/arduino-save-data-to-database/
The tutorial is about how to save data from Arduino to xampp database over the local network.
I follow everything until step 3. This is the PHP code:
<?php
// Prepare variables for database connection
$dbusername = "arduino"; // enter database username, I used "arduino" in step 2.2
$dbpassword = "arduinotest"; // enter database password, I used "arduinotest" in step 2.2
$server = "localhost"; // IMPORTANT: if you are using XAMPP enter "localhost", but if you have an online website enter its address, ie."www.yourwebsite.com"
// Connect to your database
$dbconnect = mysql_pconnect($server, $dbusername, $dbpassword);
$dbselect = mysql_select_db("test",$dbconnect);
// Prepare the SQL statement
$sql = "INSERT INTO test.sensor (value) VALUES ('".$_GET["value"]."')";
// Execute SQL statement
mysql_query($sql);
?>
I tried to run this command in the link as mentioned in the tutorial
http://localhost/write_data.php?value=100
This is the error I get
Fatal error: Uncaught Error: Call to undefined function mysql_pconnect() in C:\xampp\htdocs\write_data.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\write_data.php on line 11

Answer 1

The mysql library that you are using is deprecated in php5.5
http://php.net/manual/en/function.mysql-connect.php
Here's an updated version with mysqli_connect
$dbusername = "arduino";
$dbpassword = "arduinotest";
$server = "localhost";
$database = 'test';
$mysqli = mysqli_connect($server, $dbusername, $dbpassword,$database);
// please validate the $_GET['value']
$sql = "INSERT INTO test.sensor (value) VALUES ('".$_GET["value"]."')";
mysqli_query($mysqli, $sql);
new mysqli http://php.net/manual/en/function.mysqli-connect.php

Answer 2

Somehow i managed to connect and changed the value by typing and auto insert using this code
<?php
header("Refresh:5");
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "test";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
else {
echo "hello";
}
$value = $_GET['value'];
$sql = "INSERT INTO test.sensor (value) VALUES ($value)";
$sql = "INSERT INTO test.sensor (value)
VALUES ('255')";
if ($conn->query($sql) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
$conn->close();
?>
And without this code, which is on line 28, i will get error so i have to put this code as well
if ($conn->query($sql) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
Thank you everyone for helping really appreciate it.