is_multisite()
Function: If Multisite is enabled.
Source: wp-includes/load.php:1290
is_nav_menu()
Function: Determines whether the given ID is a navigation menu.
Source: wp-includes/nav-menu.php:62
is_nav_menu_item()
Function: Determines whether the given ID is a nav menu item.
Source: wp-includes/nav-menu.php:238
is_network_admin()
Function: Determines whether the current request is for the network administrative interface.
Source: wp-includes/load.php:1249
is_network_only_plugin()
Function: Checks for “Network: true” in the plugin header to see if this should be activated only as a network wide plugin. The plugin would also work when Multisite is not enabled.
Source: wp-admin/includes/plugin.php:605
is_new_day()
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.
Source: wp-includes/functions.php:1010
is_object_in_taxonomy()
Function: Determines if the given object type is associated with the given taxonomy.
Source: wp-includes/taxonomy.php:4917
is_object_in_term()
Function: Determines if the given object is associated with any of the given terms.
Source: wp-includes/taxonomy.php:4848
is_page()
Function: Determines whether the query is for an existing single page.
Source: wp-includes/query.php:584
is_page_template()
Function: Determines whether the current post uses a page template.
Source: wp-includes/post-template.php:1825