Save data to mysql

This is my script in php:

$con = mysqli_connect('localhost', 'root', 'root', 'unityaccess'); //la primera var es la posicion relativa de la ddbb, nombre y paswword en las sgtes

//check that conection happenned
if(mysqli_connect_errno()) //check or si pasaron algunos errores, si es true esq hubieron errores.
{
echo "1: conection failed"; // error code #1 = connection failed
exit();
}


$username = $_POST["name"];
$newscore = $_POST["score"];

$namecheckquery = "SELECT username, score FROM players WHERE username = ' " . $username . " ' ";


$namecheck = mysqli_query($con, $namecheckquery) or die("2: name check query failed"); // error code #2 = name check query failed
if(mysqli_num_rows($namecheck) != 1)
{
echo "5: Either no user with name or more than one"; // error code #5 number of names maching !=1
exit();
}

$updatequery = "UPDATE players SET score = ".$newscore." WHERE username = '".$username."' ";
mysqli_query($con, $updatequery) or die ("7: Save query failed");

echo "0";


This my script in C#:

public Text playerDisplay;
public Text scoreDisplay;
// Start is called before the first frame update
void Awake()
{

if(DBManager.username == null)
{
UnityEngine.SceneManagement.SceneManager.LoadScene(0);
}
playerDisplay.text = "Player : " + DBManager.username;
scoreDisplay.text = "score: " + DBManager.score;



public void CallSaveData()
{
StartCoroutine(SavePlayerData());
}

IEnumerator SavePlayerData()
{
WWWForm form = new WWWForm();
form.AddField("name", DBManager.username);
form.AddField("score", DBManager.score); //
WWW www = new WWW("http://localhost:8888/sqlconnect/savedata.php", form);
yield return www;
if(www.text == "0")
{
Debug.Log("Game Saved");



}
else
{
Debug.Log("Save failed. Erro # " + www.text);
}

DBManager.LogOut();
SceneManager.LoadScene(0);

}

public void IncreaseScore()
{
DBManager.score++;
scoreDisplay.text = "score: " + DBManager.score;
}


I am getting game saved but when I login again the score is still '0' and the score also did not update in my table and I don't know why.

 

This is not forum about PHP.
Also use correctly forum Code Tagging.

 

I am not seeing anything wrong. Debugging your code should come up with the answer pretty quickly. Also you should never directly access super globals ( your $_POST). You should filter and sanitize your input.