upload.php

<?php
require 'system/includes/dispatch.php';
require 'system/includes/session.php';

// Load the configuration file
config('source', 'config/config.ini');

// Set the timezone
if (config('timezone')) {
    date_default_timezone_set(config('timezone'));
} else {
    date_default_timezone_set('Asia/Jakarta');
}

$whitelist = array('jpg', 'jpeg', 'jfif', 'pjpeg', 'pjp', 'png', 'gif', 'webp');
$name      = null;
$dir       = 'content/images/';
$dirThumb  = 'content/images/thumbnails/';
$error     = null;
$timestamp = date('YmdHis');
$path      = null;
$width     = config('thumbnail.width');

if (login()) {

    if (!is_dir($dir)) {
        mkdir($dir, 0755, true);
    }
    if (is_null($width) || empty($width)) {
        $width = 500;
    }
    if (isset($_FILES) && isset($_FILES['file'])) {
        $tmp_name = $_FILES['file']['tmp_name'];
        $name     = basename($_FILES['file']['name']);
        $error    = $_FILES['file']['error'];
        $path     = $dir . $timestamp . '-' . $name;

        $check = getimagesize($tmp_name);

        if($check !== false) {
            if ($error === UPLOAD_ERR_OK) {
                $extension = pathinfo($name, PATHINFO_EXTENSION);
                if (!in_array(strtolower($extension), $whitelist)) {
                    $error = 'Invalid file type uploaded.';
                } else {
                    move_uploaded_file($tmp_name, $path);
                }

               $imageFile = pathinfo($path, PATHINFO_FILENAME);
               $thumbFile = $dirThumb . $imageFile. '-' . $width . '.webp';
               if (!file_exists($thumbFile)) {
                   create_thumb($path, $width);
               }

            }
        } else {
            $error = "File is not an image.";
        }
    }

    header('Content-Type: application/json');
    echo json_encode(array(
        'path' => $path,
        'name'  => $name,
        'error' => $error,
    ));

    die();

} else {
    $login = site_url() . 'login';
    header("location: $login");
}