Sometimes you need to add classes to HTML elements conditionally, and when you try to do that you almost always end up with messy syntax. Here’s the example in Blade:

<article class="post post-{{ $post->slug }} @if ($post->featured) post-featured @endif @if ($post->sticky) post-sticky @endif">
    ...
</article>

Or with pure PHP:

<article class="post post-<?php echo $post->slug ?> <?php if ($post->featured): ?>post-featured<?php endif ?> <?php if ($post->sticky): ?>post-sticky<?php endif ?>">
    ...
</article>

And if you split it into multi-line you get even worse, and when you add even more conditional classes you get if mess.

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