Как загрузить картинку в папке средствами PHP?

<?php
require_once 'upload.php';
class validation {
    public function check_name_length($object) {
        if (mb_strlen($object->file['original_filename']) > 5) {
            $object->set_error('File name is too long.');
        }
    }
}
if (!empty($_FILES['test'])) {
    $upload = Upload::factory('important/files');
    $upload->file($_FILES['test']);
    $validation = new validation;
    $upload->callbacks($validation, array('check_name_length'));
    $results = $upload->upload();
    var_dump($results);
}
?>

<form action="" method="post" enctype="multipart/form-data">
    <input type="file" name="test" /> 
    <input type="submit" value="Submit me" />
</form>

файл upload.php

Форма для выбора файлов

• https://www.w3schools.com/TAGS/att_input_multiple.asp

Обработчики PHP для загрузки на хост

• https://github.com/aivis/PHP-file-upload-class

• https://github.com/Gargron/fileupload

jQuery ништяк

• https://github.com/blueimp/jQuery-File-Upload