Using WordPress ‘is_main_network()’ PHP function
Determines whether a network is the main network of the Multisite installation.
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Using WordPress ‘is_main_blog()’ PHP function
Deprecated functionality to determin if the current site is the main site.
Using WordPress ‘is_local_attachment()’ PHP function
Determines whether an attachment URI is local and really an attachment.
Using WordPress ‘is_404()’ PHP function
Determines whether the query has resulted in a 404 (returns no results).
Using WordPress ‘iso8601_to_datetime()’ PHP function
Given an ISO 8601 (Ymd H:i:sO) date, returns a MySQL DateTime (Y-m-d H:i:s) format used by post_date[_gmt].
Using WordPress ‘in_category()’ PHP function
Checks if the current post is within any of the given categories.
Using WordPress ‘install_theme_search_form()’ PHP function
Learn how to use the WordPress 'install_theme_search_form()' PHP function to display a search form for searching themes in the WordPress theme directory
Using WordPress ‘install_theme_information()’ PHP function
Learn how to use the WordPress 'install_theme_information()' PHP function to display theme information in various ways such as a dialog box or on an admin page
Using WordPress ‘install_themes_feature_list()’ PHP function
Retrieves the list of WordPress theme features (aka theme tags).