Function:

mp_core_categorized_blog()

Purpose:

This function returns true if a blog has more than 1 category.

Overview:

This is useful when deciding whether to output a list of categories on a post page. Often it will be used with the “get_the_category_list()” function in WordPress.

Usage:

if ( mp_core_categorized_blog() ) { //This blog has more than 1 category so show categories }

//Get the list of categories for this post separated by a comma
$categories_list = get_the_category_list( __( ', ', 'textdomain' ) );

//If there is a category list and this blog has more than 1 category
if ( $categories_list && mp_core_categorized_blog() ) { 

//This blog has more than 1 category so show categories 

}

Returns:

(boolean)

Returns true if the WP blog has more than 1 category. False if there is only 1 or none.