if($submit)
    {
        $first=$_POST['first'];
        $password=$_POST['password'];
        $hash="*85955899FF0A8CDC2CC36745267ABA38EAD1D28"; //this is the hashed password i got by using function PASSWORD in database
        $password=password_verify($password,$hash);
        $db = new mysqli("localhost", "root","","learndb");
        $sql = "select * from admin where username = '" . $first . "' and password = '". $password . "'";
        $result = $db->query($sql);
        $result=mysqli_num_rows($result);


        if($result>0)
    {

        session_start();
        $_SESSION['logged_in'] = true;
        session_regenerate_id(true);
        header("Location:loginhome.php");

    }
}