Include the Category ID via post_class

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Monday, 11 January 2010

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The default output for WordPress’ post_class template tag includes class names for just about every type of page view imaginable:

page-parent
search-results
logged-in
author
paged

Plus just about everything else except for category ID information. It gives some good category-specific class names, but nothing to represent the category ID. For example, including the post_class function like this in your markup:
<div <?php post_class(); ?>>

Will output something like this in your HTML source code:
<div class=”post-5 post hentry category-uncategorized tag-demo tag-site tag-test tag-themes tag-typography”>
So if you happen to know the actual names of the categories then it’s not really needed, but for theme development, it’s useful to be able to generalize category distinctions and have them available as class names. Why? Because then the theme designer can apply category-specific styles very easily, and without having to mess with using actual category names.
For example, if we had the first…

By: Jeff Starr
From: Digging into WordPress

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