WordPress offers numerous functions for retrieving different types of content. One such function is the "get_categories()" function. As the name suggests, this function is used to retrieve the categories associated with a post or a custom post type.
This function can be used to retrieve an array of category objects that are associated with a particular post or custom post type. The categories returned by this function include both the default and custom categories that have been created by the user.
Apart from retrieving the categories for a single post, this function can also be used to retrieve all the categories that have been created on the site, along with their corresponding objects.
Here’s an example usage code for the "get_categories()" function:
$categories = get_categories( array( ‘orderby’ => ‘name’, ‘order’ => ‘ASC’ ) );
This example code retrieves all categories in alphabetical order, starting from the A’s and ending with the Z’s.
In conclusion, the "get_categories()" function is a useful function for retrieving categories associated with a post or custom post type. It can also be used to retrieve all categories created on the site.