The problem
Sometimes you need to get the ID of the parent category when you’re browsing a child category page. Don’t you? 🙂
The solution
Get the ID of the parent category with a few lines of PHP code:
<?php
if( is_category() ) {
$q_cat = get_query_var('cat');
$cat = get_category( $q_cat );
echo $cat->category_parent; // Print the ID
}
?>
Requirements
- WordPress 1.5.1 and above
Reference: http://forum.wordpress-deutschland.org/design/50877-hauptkategorie-id-auslesen.html