<?php
$servername = "localhost";
$username = "u298086314_ESP8266"; 
$password = "ESP8266_IoT";  
$dbname = "u298086314_ESP8266"; 

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
  die("Connection failed: " . $conn->connect_error);
}
//echo "Connected successfully";
?>

<?php
// ... (connection code from above)
//echo "--------------------";
$sql = "SELECT V3 FROM Test_IOT where ID = 5"; 
$result = $conn->query($sql);
?>
<?php
// ... (connection and query code from above)

if ($result->num_rows > 0) {
  // Output data of each row
  while($row = $result->fetch_assoc()) {
    //echo $row["V2"] ;
  }
} else {
  //echo "0 results";
}
$conn->close(); // Close the database connection
?>