Some times as a theme developers we may have to display only specific number of categories a post is filed in as a large number of categories may break the layout in some cases and sometimes we may have to display only one category.
For example in SWIFT magazine layout, I display one category overlayed on the thumbnail.
Unfortunately WordPress functions get_the_category(), the_category() do not take any arguments and display all the categories the post is filed in. I wrote this small function during the development of swift to echo a specific number of categories a post is filed in. I hope this will help the fellow theme developers
A custom function to echo specified number of categories a
post is filed in.
(Takes number of categories to be displayed as argument)
Written by Satish Gandham
Author URL: http://swiftthemes.com
$count=count($temp);// Getting the total number of categories the post is filed in.
//Formatting our output.
$cat_string.='<a href="'.get_category_link( $temp[$i]->cat_ID ).'">'.$temp[$i]->cat_name.'</a>';
//Adding a ',' if it's not the last category.
//You can add your own separator here.
Usage is similar to the_category() function, except we take arguments here.
Filed under <?php swift_list_cats(3); ?>
If you have any questions feel free to drop them in comments