<?php
--------------------------------------------------------------------------
DATABASE
--------------------------------------------------------------------------
$host = 'localhost';
$username = 'root';
$password = 'root';
$database = 'db1';
$connection = mysqli_connect($host, $username, $password, $database);

if (mysqli_connect_error($connection)) die('Error connecting');

$emri = 'erald';
$mbiemri = 'domi';
if (!mysqli_query($connection, "INSERT INTO users (emri, mbiemri) VALUES ($emri, $mbiemri)")) die('Error adding user.');

$result = mysqli_query($connection, "SELECT * FROM users;");
if (mysqli_num_rows($result) > 0) {
    while ($row = mysqli_fetch_assoc($connection, $result)) {
        echo $row['emri'] . ' ' . $row['mbiemri'];
    }
}
mysqli_close($connection);
--------------------------------------------------------------------------
AJAX
--------------------------------------------------------------------------
?>

var req = new XMLHttpRequest();
req.onreadystatechange = function () {
    if (this.readyState == 4 && this.status == 200) {
        document.getElementById('filan_id').innerHTML = this.responseText;
    }
}
req.open('GET', 'url', true);
req.send();