<?php

require './db_config.php';

$sql = 'SELECT login, password, email, created FROM user ';

$result = $mysqli->query($sql);

if ($result != null) {
    while ($row = $result->fetch_assoc()) {
        $json[] = $row;
    }

    $data['konto'] = $json;
    $result = mysqli_query($mysqli, $sql);
    echo json_encode($data);
} else
    echo "keine Daten empfangen!";

?>