'How to get file name encrypt file upload codeigniter in looping for

for ($img=0;$img<=5;$img++)
{
    if (!empty($_FILES['picture_add_'.$img]))
    {
        if ($this->upload->do_upload('picture_add_'.$img))
        {
            $uploaded = $this->upload->data();
            $data_picture_add = array(
                                    'filename'  => $uploaded['file_name'],
                                    'id'        => $last_id
                                    );
            $this->db->insert('db_picture_individual', $data_picture_add);
        }
    }
}

if I input 2 file picture or more, I just get one filename encrypted.

How to get all filename encrypted ?

this is the view :

<input name="picture_add_1" class="form-control" style="padding-top: 0;" type="file">
<input name="picture_add_2" class="form-control" style="padding-top: 0;" type="file">
<input name="picture_add_3" class="form-control" style="padding-top: 0;" type="file">
<input name="picture_add_4" class="form-control" style="padding-top: 0;" type="file">
<input name="picture_add_5" class="form-control" style="padding-top: 0;" type="file">


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Source: Stack Overflow

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