Untitled

<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <div id="display"><div>
    <script>
        function xml_request() {
            var xhr = new XMLHttpRequest();
            xhr.open("GET", "includes/worker_info.php");
            xhr.onload = function () {
                var next_url = "includes/document_info.php?id="
                var worker_info = xhr.responseText.split("-----");
                for (var y=0;y<worker_info.length;y++) {
                    worker_info[y] = worker_info[y].split(",,,,,");
                    next_url += worker_info[y][0] + ",";
                }

                var xhr2 = new XMLHttpRequest();
                xhr2.open("GET", next_url);
                xhr2.onload = function () {
                    var document_info = xhr2.responseText.split("-----");
                    for (var y=0;y<document_info.length;y++) {
                        document_info[y] = document_info[y].split(",,,,,");
                        for (var y=0;y<worker_info.length;y++) {
                            var documents_names = "Name: " + worker_info[y][1] + ", Documents: ";
                            for (var x=0;x<document_info.length;x++) {
                                if (worker_info[y][0] == document_info[x][0]) {
                                    documents_names += document_info[x][1];
                                }
                            }
                            document.getElementById("display").innerHTML += "<p>" + documents_names + "</p>";
                        }
                    }
                };
                xhr2.send();
            };
            xhr.send();
        }

        xml_request();
    </script>
</body>
</html>

<?php
    $dbServername = "localhost";
    $dbUsername = "root";
    $dbPassword = "";
    $dbName = "database";
    $conn = mysqli_connect($dbServername, $dbUsername, $dbPassword, $dbName);

    $command = "SELECT * FROM workers;";
    $return_array = "";
    $result = mysqli_query($conn, $sql_film);
    while ($row = mysqli_fetch_assoc($result)) {
        $return_array .= $row['id'].",,,,,".$row['name'].",,,,,".$row['dob'].",,,,,".$row['address']."-----";
    }

    echo ($return_array);
?>

<?php
    $id = $_GET["id"];
    $id = explode(',', $id);
    array_pop($id);
    $return_array = "";
    foreach ($id as $x) {
        $dir = "workers_documents/".$x."/";
        if ($dh = opendir($dir)) {
            while (($file = readdir($dh)) !== false) {
                if ($file !== ".." && $file !== ".") {
                    $return_array .= $x.",,,,,".$file."-----";
                }
            }
            closedir($dh);
        }
    }
    echo ($return_array);
?>