Using WordPress ‘is_user_option_local()’ PHP function
Check whether a usermeta key has to do with the current blog.
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Using WordPress ‘is_uninstallable_plugin()’ PHP function
Learn how to check if a plugin can be uninstalled using the WordPress `is_uninstallable_plugin()` function in this article
Using WordPress ‘is_term_publicly_viewable()’ PHP function
Is_term_publicly_viewable() is a WordPress function used to determine whether a term is publicly viewable based on its taxonomy
Using WordPress ‘is_tax()’ PHP function
Determines whether the query is for an existing custom taxonomy archive page.