asdf

<?php

    session_start();
    require_once("connect.php");

    if(isset($_POST['username']) && isset($_POST['password'])) {
        if( !(empty($_POST['username'] ) ) && (!empty($_POST['password'])) ) {

            $username = $_POST['username'];
            $password = $_POST['password'];

            $stmt = $mysqli->prepare("SELECT username, password FROM user WHERE username = ? && password = ?");
            $stmt->bind_param('ss', $username, $password);
            $stmt->execute();

            $result = $stmt->get_result();
            if($result_array = $result->fetch_assoc()) {
                echo "jest ok";
                echo $result_array["username"];
            //ustaw sesje
            } else {
                echo "dupa";
            }
        }
    }
?>