This blog post will give you update list of most useful functions of WordPress. Below functions basically used for WordPress category management.

• get_cat_ID : This function return the ID of category.

• get_cat_name : This function return the name of  category.

• get_categories : This function returns the Categories

• get_category : This function give the only one category with ID.

• get_category_by_path : This function Returns the path of Category.

• get_category_by_slug : Returns the slug of category. 

• get_the_category_by_ID : Returns the category by ID.

• get_the_category_list : Returns the categories by in array format.

• is_category : Is the category is available? check the availability of category. 

• the_category : Check the category of post. 

• wp_list_categories : Return all categories in array format. 

Category Creation

• wp_create_category : This function used to create category.

• wp_delete_category : This function used to delete category.

• wp_insert_category : This function used to insert category.