Multiple Image Upload with more inputs, but only one image uploaded

I have a problem, with upload images, but more inputs.

I want that When user is upload an image,then the image creating in ../upload with the renaming: ID variable $i Variable --> This an image id( $_FILES['tmp_name'][ $i ] Picture Description variable

And my problem that the images don't upload. But one image is upload, and the image name is 25-0-Description.jpg, and 25-2-Description.jpg nowhere

Advert class / Image Upload function

public function ImageUpload($file)
{
    global $id,$termek_neve;
    for($i = 0;$i < count($file['name']);$i++)
    {
        if(!empty($file['tmp_name'][$i]))
        {
            $name = $this->t_id.'-'.$i.'-'.$this->t_nev.".jpg";
            $name = removeAccents($name);
            $success = move_uploaded_file($file['tmp_name'][$i],
            UPLOAD_DIR . $name);
            if (!$success) { 
                return false;
            } else return 1;
            chmod(UPLOAD_DIR . $name, 0644);
        }
    }   
}

In Image Upload php file

...
    $ad = new Advert();
...
    $file = $_FILES['ex1'];

        $img = $ad->ImageUpload($file);
...
//inputs
<form accept-charset="UTF-8" method='POST' enctype="multipart/form-data">
    <input type='file' id='' name='ex1[]' />
    <input type='file' id='' name='ex1[]' />
    <input type='file' id='' name='ex1[]' />
    <input type='file' id='' name='ex1[]' />
    <input type='file' id='' name='ex1[]' />
... // ^-- more inputs
</form>

Result: First image is uploading, ID-0-description.jpg,