get_category_by_path()
Function: Retrieves a category based on URL containing the category slug.
Source: wp-includes/category.php:124
get_category_by_slug()
Function: Retrieves a category object by category slug.
Source: wp-includes/category.php:187
get_cat_ID()
Function: Retrieves the ID of a category from its name.
Source: wp-includes/category.php:205
get_cat_name()
Function: Retrieves the name of a category from its ID.
Source: wp-includes/category.php:223
cat_is_ancestor_of()
Function: Checks if a category is an ancestor of another category.
Source: wp-includes/category.php:246