Get first image of shuffled files collection?

The CMS Questions
1

I’m trying to get all images of a page, shuffle them and then output the URL of the first image of this shuffled collection.

Why is this throwing an error?

<?php 
  $imgs = $page->images()->shuffle();
  $previewImg = $imgs->first() 
?>

<img src="<?= $previewImg->url() ?>">

(The error thrown is »Call to a member function url() on null«)

2

If $previewImg = $imgs->first() doesn’t return an image, your call to url will fail with this error. Never call a class method without making sure you have an instance of that class.

Use an if statement to check first.

3

Thanks. I feel stupid now.

4

No reason to feel stupid. It won’t happen to you again…