Using WordPress ‘is_plugin_inactive()’ PHP function
Learn how to use the WordPress 'is_plugin_inactive()' PHP function, which determines whether a specific plugin is inactive, with examples and code snippets
WordPress
Using WordPress ‘is_page_template()’ PHP function
Determines whether the current post uses a page template.
Using WordPress ‘is_new_day()’ PHP function
Determines whether the publish date of the current post in the loop is different from the publish date of the previous post in the loop.
Using WordPress ‘is_multi_author()’ PHP function
Determines whether this site has more than one author.