invisio v2.0

<?php
include('../../../config/main_function.php');
$secure = "cAh3DrJACzw4RbU";
$connection = connectDB($secure);

$member_id = mysqli_real_escape_string($connection, $_POST['member_id']);

if (is_array($_FILES)) {
    foreach ($_FILES['document_file_more']['name'] as $name => $value) {
        if ($_FILES['document_file_more']['tmp_name'][$name]) {

$file = explode(".", $_FILES['document_file_more']['name'][$name]);
            $file_num = count($file) - 1;
            $file_surname = $file[$file_num];
            $document = md5(date('mds') . rand(111, 999) . date("hsid") . rand(111, 999)) . "." . $file_surname;
            $target_file = "../../../main/upload/join/file/" . $document;

if (move_uploaded_file($_FILES["document_file_more"]["tmp_name"][$name], $target_file)) {

$document_id = getRandomID(10, 'tbl_member_document', 'document_id');
                $list_order = list_order('tbl_member_document', 'document_list_order', "WHERE member_id = '$member_id'");

$sql_insert = "INSERT INTO tbl_member_document SET document_id = '$document_id', document_file_name = '$document' ,  document_list_order = '$list_order', member_id = '$member_id'";
                $res_insert = mysqli_query($connection, $sql_insert);
                if ($res_insert) {
                    $arr['result'] = 1;
                } else {
                    $arr['result'] = 9;
                }
            }
        }
    }
}

echo json_encode($arr);