- October 9, 2026apply_filters_ref_array(): Calls the callback functions that have been added to a filter hook, specifying arguments in an array.
- October 9, 2026antispambot(): Obscures email addresses in HTML to prevent spam bots from harvesting them.
- October 9, 2026admin_url(): Retrieves the URL to the admin area for the current site.
- October 9, 2026adjacent_post_link(): Displays the adjacent post link.
- October 9, 2026adjacent_posts_rel_link(): Displays the relational links for the posts adjacent to the current post.
- October 9, 2026add_user_meta(): Adds meta data to a user.
- October 9, 2026adjacent_image_link(): Displays next or previous image link that has the same post parent.
- October 9, 2026add_theme_support(): Registers theme support for a given feature.
- October 9, 2026add_site_option(): Adds a new option for the current network.
- October 9, 2026add_term_meta(): Adds metadata to a term.
- October 9, 2026add_role(): Adds a role, if it does not exist.
- October 9, 2026add_shortcode(): Adds a new shortcode.
- October 9, 2026add_rewrite_tag(): Adds a new rewrite tag (like %postname%).
- October 9, 2026add_network_option(): Adds a new network option.
- October 9, 2026add_option(): Adds a new option.
- October 9, 2026add_post_meta(): Adds a meta field to the given post.
- October 9, 2026add_post_type_support(): Registers support of certain features for a post type.
- October 9, 2026add_query_arg(): Retrieves a modified URL query string.
- October 9, 2026add_rewrite_endpoint(): Adds an endpoint, like /trackback/.
- October 9, 2026add_rewrite_rule(): Adds a rewrite rule that transforms a URL structure to a set of query vars.
- October 9, 2026add_filter(): Adds a callback function to a filter hook.
- October 9, 2026add_image_size(): Registers a new image size.
- October 9, 2026add_metadata(): Adds metadata for the specified object.
- October 9, 2026add_action(): Adds a callback function to an action hook.
- October 9, 2026add_comment_meta(): Adds meta data field to a comment.
- October 9, 2026add_editor_style(): Adds callback for custom TinyMCE editor stylesheets.
