Warning: Undefined array key "login" in C:\xampp\htdocs\unity\login.php on line 3

Warning: Undefined array key "haslo" in C:\xampp\htdocs\unity\login.php on line 4

Fatal error: Uncaught TypeError: mysqli_select_db(): Argument #1 ($mysql) must be of type mysqli, string given in

C:\xampp\htdocs\unity\login.php:10 Stack trace: #0 C:\xampp\htdocs\unity\login.php(10): mysqli_select_db('konta', Object(mysqli)) #1 {main} thrown in C:\xampp\htdocs\unity\login.php on line 10

<?PHP

$user = $_POST['login'];
$pass = $_POST['haslo'];

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

$check = mysqli_query("SELECT * FROM konta WHERE `login`='".$user."'");
$numrows = mysqli_num_rows($check);
if ($numrows == 0)
{
    die ("Podany login nie istnieje \n");
}
else
{
    $pass = md5($pass);
    while($row = mysqli_fetch_assoc($check))
    {
        if ($pass == $row['haslo'])
            die("login-SUCCESS");
        else
            die("Bledne haslo. \n");
    }
}

?>

CodePudding user response：

Looks like the parameters are in the wrong order mysqli_select_db("konta" , $con) or die ("Nie mozna wczytac bazy danych" . mysqli_error());

should be mysqli_select_db($con, "konta")

CodePudding user response：

Sorry It worked, thanks for all.