Using WordPress ‘is_robots()’ PHP function
How to Use the WordPress `is_robots()` Function in Your Theme or Plugin File
WordPress
Using WordPress ‘is_protected_endpoint()’ PHP function
Determines whether we are currently on an endpoint that should be protected against WSODs.
Using WordPress ‘is_post_type_hierarchical()’ PHP function
Is_Post_Type_Hierarchical() is a WordPress function that determines whether a post type is hierarchical or not
Using WordPress ‘is_plugin_paused()’ PHP function
Determines whether a plugin is technically active but was paused while loading.