About array

[eluser]Unknown[/eluser]
Please anybody can help. I am trying to build a gallery and when I try to get images of directory I get images thumbnail but there is one blank thumbnail. So how do I remove this thumbnail . Please can any body help me.

Code:

function get_images($sata) {
        $this->load->helper('directory');
        $files = directory_map($sata);
        $files = array_diff($files, array('.', '..', 'thumbs'));
        
        $images = array();
        
        foreach ($files as $file) {
            $images []= array (
                'url' => base_url().'uploads/' . $file,
                'thumb_url' => base_url(). 'thumbs/' .  $file
            );
        }

vI have uploaded the screenshot. please Help me