is_client_error()
Function:
Source: wp-includes/rss.php:707
is_comments_popup()
Function: Determines whether the current URL is within the comments popup window.
Source: wp-includes/deprecated.php:3731
is_comment_feed()
Function: Is the query for a comments feed?
Source: wp-includes/query.php:415
is_countable()
Function: Polyfill for is_countable() function added in PHP 7.3.
Source: wp-includes/compat.php:522
is_customize_preview()
Function: Whether the site is being previewed in the Customizer.
Source: wp-includes/theme.php:3203
is_date()
Function: Determines whether the query is for an existing date archive.
Source: wp-includes/query.php:344
is_day()
Function: Determines whether the query is for an existing day archive.
Source: wp-includes/query.php:370
is_dynamic_sidebar()
Function: Determines whether the dynamic sidebar is enabled and used by the theme.
Source: wp-includes/widgets.php:870
is_email()
Function: Verifies that an email is valid.
Source: wp-includes/formatting.php:3257
is_email_address_unsafe()
Function: Checks an email address against a list of banned domains.
Source: wp-includes/ms-functions.php:381
is_embed()
Function: Is the query for an embedded post?
Source: wp-includes/query.php:809
is_error()
Function:
Source: wp-includes/rss.php:703
is_feed()
Function: Determines whether the query is for a feed.
Source: wp-includes/query.php:395
is_front_page()
Function: Is the query for the front page of the site?
Source: wp-includes/query.php:448
is_header_video_active()
Function: Checks whether the custom header video is eligible to show on the current page.
Source: wp-includes/theme.php:1503
is_home()
Function: Determines if the query is for the blog homepage.
Source: wp-includes/query.php:481
is_info()
Function:
Source: wp-includes/rss.php:691
is_iterable()
Function: Polyfill for is_iterable() function added in PHP 7.1.
Source: wp-includes/compat.php:544
is_lighttpd_before_150()
Function: Is the server running earlier than 1.5.0 version of lighttpd?
Source: wp-includes/functions.php:4690
is_locale_switched()
Function: Whether switch_to_locale() is in effect.
Source: wp-includes/l10n.php:1594
is_local_attachment()
Function: Determines whether an attachment URI is local and really an attachment.
Source: wp-includes/post.php:5305
is_main_blog()
Function: Deprecated functionality to determin if the current site is the main site.
Source: wp-includes/ms-deprecated.php:154
is_main_network()
Function: Determine whether a network is the main network of the Multisite installation.
Source: wp-includes/functions.php:4986
is_main_query()
Function: Determines whether the query is the main query.
Source: wp-includes/query.php:833
is_main_site()
Function: Determine whether a site is the main site of the current network.
Source: wp-includes/functions.php:4942
is_month()
Function: Determines whether the query is for an existing month archive.
Source: wp-includes/query.php:505
is_multisite()
Function: If Multisite is enabled.
Source: wp-includes/load.php:912
is_multi_author()
Function: Determines whether this site has more than one author.
Source: wp-includes/author-template.php:541
is_nav_menu()
Function: Check if 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:230