A database error only returns a nothing more error and the code is short

Error:

Fatal error: Uncaught Error: Call to undefined function
mysqli_result() in > C:xampphtdocsunityodczytDanych.php:12 Stack
trace: #0 {main} thrown in C:xampphtdocsunityodczytDanych.php on
line 12

Hello, I am a learning programmer, I do not know why the code does not work or someone can help me find the problem or help me fix it.

code:

<?PHP
$tabela = $_POST['tabela'];
$gracz = $_POST['gracz'];
$zmiennaIN = $_POST['zmienna'];

$con = mysqli_connect("localhost","root","") or ("Blad polaczenia: "  . mysqli_error());
if (!$con)
    die('Nie mozna polaczayc: ' . mysqli_error());
    
mysqli_select_db($con, "konta") or die ("Nie mozna wczytac bazy danych" . mysqli_error());

$zmiennaOUT = mysqli_result(mysqli_query($con, "SELECT '".$zmiennaIN."' FROM '".$tabela."' WHERE login='".$gracz."'"), 0);

die ($zmiennaOUT);

?>