invisio v2.0

<?php

session_start();
    include("../../../config/main_function.php");

$secure = "cAh3DrJACzw4RbU";
    $connection = connectDB($secure);

$seo_id = mysqli_real_escape_string($connection, $_POST['seo_id']);
    $page_title = mysqli_real_escape_string($connection, $_POST['page_title']);
    $page_description = mysqli_real_escape_string($connection, $_POST['page_description']);
    $page_url = mysqli_real_escape_string($connection, $_POST['page_url']);

if ($connection) {

if ($_FILES['seo_image']["name"] != "") {

$file = explode(".", $_FILES['seo_image']['name']);
            $file_num = count($file) - 1;
            $file_surname = $file[$file_num];
            $filename_images = md5(date("dmYhis") . rand(1000, 9999)) . "." . $file_surname;
            $target_file = "../../../img/seo/" . $filename_images;

if (move_uploaded_file($_FILES["seo_image"]["tmp_name"], $target_file)) {
                $page_image = $filename_images;
            } else {
                $page_image = "";
            }
        }

$sql_update = "UPDATE tbl_setting_seo SET  
        page_title = '$page_title',
        page_description = '$page_description',
        page_url = '$page_url',
        page_image = '$page_image'
        WHERE seo_id = '$seo_id'";

$res_update = mysqli_query($connection, $sql_update)  or die($connection->error);

if ($res_update) {
            $arr['result'] = 1;
        } else {
            $arr['result'] = 0;
        }
    } else {
        $arr['result'] = 9;
    }
    echo json_encode($arr);

mysqli_close($connection);
    ?>