Code compatible with CodeIgniter

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Code compatible with CodeIgniter - El Forum - 06-12-2012

[eluser]Gabi3xz[/eluser]
I have a code which extract images from a folder.

Code:
$dir = base_url().'images/user';

$file_display = array('jpg', 'jpeg', 'png', 'gif');

if (file_exists($dir) == false) {

   $images = 'nu sunt';

} else { 

   $dir_images = scandir($dir);

   $images = '<div>';

    foreach ($dir_images as $file) {

     $file_type = strtolower(end(explode('.', $file)));

     if ($file !== '.' && $file !== '..' && in_array($file_type, $file_display) == true) {

     $images .= '<a href="#"><img src="'.base_url().'/'.$dir.'/'.$file.'" alt="'.$file.'" /></a>';

     }

    }

   $images .= '</div>';

}

Says that it has certain functions compatible. "scandir"
What can I do?