get_the_category_by_ID()
Function: Retrieves category name based on category ID.
Source: wp-includes/category-template.php:109
get_the_category_list()
Function: Retrieves category list for a post in either HTML list or custom format.
Source: wp-includes/category-template.php:141
the_category_list
Filter Hook: Filters the categories before building the category list.
Source: wp-includes/category-template.php:158
the_category
Filter Hook: Filters the category or list of categories.
Source: wp-includes/category-template.php:230
in_category()
Function: Checks if the current post is within any of the given categories.
Source: wp-includes/category-template.php:257