How to get one random image from ten thousand folders using glob?

I have thousand directory folders like this:

img/monkey-folder/ cute-monkey.jpg etc. etc
img/turkey-folder/
img/rose-folder/
img/big-fish-folder/
img/more-folder/
etc.

Each folder has 20 images.

How to get only 1 random image?

This code below is working but only pull 1 image from 1 folder. I need one random image from multiple folders. thanks

<?php
$imagesDir = 'img/monkey-folder/';
$images = glob($imagesDir . '*.{jpg,jpeg,png,gif}', GLOB_BRACE);
$randomImage = $images[array_rand($images)];
echo $randomImage; //output img/monkey-folder/etc.jpg
?>

Code (markup):

 

I think this could do that for you

<?php
$imagesDir = glob('img/*', GLOB_ONLYDIR);
$randomfolder = $imagesDir[array_rand($imagesDir)];
$images = glob($randomfolder . '*.{jpg,jpeg,png,gif}', GLOB_BRACE);
$randomImage = $images[array_rand($images)];
echo $randomImage; //output img/monkey-folder/etc.jpg
?>

Code (markup):

 

Thanks but still not working . Is it better to use glob or readdir? I want to display one image from many folders.

 

<?php
$imagesDir = glob('img/*', GLOB_ONLYDIR);
$randomfolder = $imagesDir[array_rand($imagesDir)];
$images = glob($randomfolder . '/*.{jpg,jpeg,png,gif}', GLOB_BRACE);
$randomImage = $images[array_rand($images)];
echo $randomImage; //output img/monkey-folder/etc.jpg
?>

Code (markup):

try this, may be the missing / on line 4

 

This code does work, I have tested it.
It was missing the slash.
One thing I did notice, I have some images as .JPG not .jpg, and .PNG not .png. And so on.

So you really may want to use this code instead.

<style>
.image {
    width:100px;
    height:100px;
}
</style>
<?php
$imagesDir = glob('Car/*', GLOB_ONLYDIR);
$randomfolder = $imagesDir[array_rand($imagesDir)];
$images = glob($randomfolder . '/*.{jpg,jpeg,png,gif,JPG,JPEG,PNG,GIF}', GLOB_BRACE);
$randomImage = $images[array_rand($images)];
echo '<img src="'.$randomImage.'" class="image">'; 
?>

Code (markup):

 

Thank you. It workssssssss!!