How to get random image from directory using laravel

I have a directory containing the sub-directory, in each sub-directory there are images. I want to display the images randomly. Below my code in php that works well, but it does not work in Laravel, problem with opendir and readdir.

view blade

<?php
$folder = opendir('images/');

$i = 0;
while(false !=($file = readdir($folder))){
if($file != "." && $file != ".."){
    $images[$i]= $file;
    $i++;
    }
}
$random_img=rand(0,count($images)-1);
?> 

<div>
<?php
echo '<img src="images/'.$images[$random_img].'" alt="" />';
?>
</div>