MYSQL to JSON getuser.php

<?php
    //Koneksi ke DB
    $host = "localhost";
    $user = "root";
    $password = "";
    $database = "ucup";

    $koneksi = mysqli_connect($host,$user,$password,$database);

    if($koneksi->connect_error){die("Koneksi gagal");}
    //Akhir Koneksi ke DB

    $hasil  = mysqli_query($koneksi,"select * from user");
    if(mysqli_num_rows($hasil) > 0 )
    {
        $response = array();
        while($x = mysqli_fetch_array($hasil))
        {
            $h['username'] = $x["username"];
            $h['password'] = $x["password"];
            array_push($response, $h);
        }
        header('Content-type: application/json');
        echo json_encode($response);
    }
    else
    {
        echo "Data tidak tersedia";
    }
?>