_copy_image_file() – Copy an existing image file.
_crop_image_resource() – Crops an image resource. Internal use only.
_doing_it_wrong() – Mark something as being incorrectly called.
_flip_image_resource() – Flips an image resource. Internal use only.
_get_non_cached_ids() – Retrieve ids that are not already present in the cache.
_get_widget_id_base() – Retrieves the widget ID base value.
_image_get_preview_ratio() – Image preview ratio. Internal use only.
_insert_into_post_button() – This was once used to display an ‘Insert into Post’ button.
_ipad_meta() –
_is_valid_nav_menu_item() – Return if a menu item is valid.
_load_image_to_edit_path() – Retrieve the path or url of an attachment’s attached file.
_load_textdomain_just_in_time() – Loads plugin and theme textdomains just-in-time.
_nav_menu_item_id_use_once() – Prevents a menu item ID from being used more than once.
_remove_qs_args_if_not_in_url() – Removes arguments from a query string if they are not present in a URL DO NOT use this in plugin code.
_rotate_image_resource() – Returns an image resource. Internal use only.
_sort_nav_menu_items() – Sort menu items by the desired key.
_usort_terms_by_ID() – Sort categories by ID.
_wp_admin_bar_init() – Instantiate the admin bar object and set it up as a global for access elsewhere.
_wp_customize_include() – Includes and instantiates the WP_Customize_Manager class.
_wp_get_image_size_from_meta() – Get the image size as array from its meta data.
_wp_image_editor_choose() – Tests which editors are capable of supporting the request.
_wp_iso_convert() – Helper function to convert hex encoded chars to ASCII
_wp_menu_item_classes_by_context() – Add the class property classes for the current context, if applicable.
_wp_sanitize_utf8_in_redirect() – URL encode UTF-8 characters in a URL.
add_clean_index() – Adds an index to a specified table.
add_custom_image_header() – Add callbacks for image header display.
add_image_size() – Register a new image size.
adjacent_image_link() – Displays next or previous image link that has the same post parent.
akismet_admin_init() –
Akismet_Admin::admin_init() –
Akismet_Admin::check_server_ip_connectivity() –
Akismet_Admin::init_hooks() –
Akismet_Admin::init() –
akismet_get_ip_address() –
akismet_init() –
Akismet_REST_API::init() – Register the REST API routes.
Akismet_REST_API::key_is_valid() –
Akismet_REST_API::sanitize_interval() –
Akismet::disable_moderation_emails_if_unreachable() – If Akismet is temporarily unreachable, we don’t want to "spam" the blogger with moderation emails for comments that will be automatically cleared or spammed on the next retry.
Akismet::get_ip_address() –
Akismet::init_hooks() – Initializes WordPress hooks
Akismet::init() –
Akismet::inject_ak_js() –
Akismet::is_test_mode() –
allow_subdirectory_install() – Allow subdirectory installation.
allow_subdomain_install() – Allow subdomain install
atom_site_icon() – Displays Site Icon in atom feeds.
AtomParser::is_declared_content_ns() –
attachment_id3_data_meta_box() – Display fields for ID3 data
background_image() – Display background image path.
cat_is_ancestor_of() – Check if a category is an ancestor of another category.
check_import_new_users() – Checks if the current user has permissions to import new users.
comment_author_IP() – Display the IP address of the author of the current comment.
comment_id_fields() – Output hidden input HTML for replying to comments.
comment_ID() – Display the comment id of the current comment.
convert_invalid_entities() – Converts invalid Unicode references range to valid range.
create_initial_post_types() – Creates the initial post types when ‘init’ action is fired.
create_initial_rest_routes() – Registers default REST API routes.
create_initial_taxonomies() – Creates the initial taxonomies.
current_theme_info() – Retrieves information on the current active theme.
Custom_Background::init() – Set up the hooks for the Custom Background admin page.
Custom_Image_Header::__construct() – Constructor – Register administration header callback.
Custom_Image_Header::admin_page() – Display the page based on the current step.
Custom_Image_Header::ajax_header_add() – Given an attachment ID for a header image, updates its "last used" timestamp to now.
Custom_Image_Header::ajax_header_crop() – Gets attachment uploaded by Media Manager, crops it, then saves it as a new object. Returns JSON-encoded object details.
Custom_Image_Header::ajax_header_remove() – Given an attachment ID for a header image, unsets it as a user-uploaded header image for the current theme.
Custom_Image_Header::attachment_fields_to_edit() – Unused since 3.5.0.
Custom_Image_Header::create_attachment_object() – Create an attachment ‘object’.
Custom_Image_Header::css_includes() – Set up the enqueue for the CSS files
Custom_Image_Header::customize_set_last_used() – Updates the last-used postmeta on a header image attachment after saving a new header image via the Customizer.
Custom_Image_Header::filter_upload_tabs() – Unused since 3.5.0.
Custom_Image_Header::finished() – Display last step of custom header image page.
Custom_Image_Header::get_default_header_images() –
Custom_Image_Header::get_header_dimensions() – Calculate width and height based on what the currently selected theme supports.
Custom_Image_Header::get_previous_crop() – Get the ID of a previous crop from the same base image.
Custom_Image_Header::get_uploaded_header_images() –
Custom_Image_Header::help() – Adds contextual help.
Custom_Image_Header::init() – Set up the hooks for the Custom Header admin page.
Custom_Image_Header::insert_attachment() – Insert an attachment and its metadata.
Custom_Image_Header::js_1() – Display JavaScript based on Step 1 and 3.
Custom_Image_Header::js_2() – Display JavaScript based on Step 2.
Custom_Image_Header::js_includes() – Set up the enqueue for the JavaScript files.
Custom_Image_Header::js() – Execute JavaScript depending on step.
Custom_Image_Header::process_default_headers() – Process the default headers
Custom_Image_Header::remove_header_image() – Remove a header image.
Custom_Image_Header::reset_header_image() – Reset a header image to the default image for the theme.
Custom_Image_Header::set_header_image() – Choose a header image, selected from existing uploaded and default headers, or provide an array of uploaded header data (either new, or from media library).
Custom_Image_Header::show_header_selector() – Display UI for selecting one of several default headers.
Custom_Image_Header::step_1() – Display first step of custom header image page.
Custom_Image_Header::step_2_manage_upload() – Upload the file to be cropped in the second step.
Custom_Image_Header::step_2() – Display second step of custom header image page.
Custom_Image_Header::step_3() – Display third step of custom header image page.
Custom_Image_Header::step() – Get the current step.
Custom_Image_Header::take_action() – Execute custom header modification.
date_i18n() – Retrieve the date in localized format, based on timestamp.
do_block_editor_incompatible_meta_box() – Function that renders a "fake" meta box with an information message, shown on the block editor, when an incompatible meta box is found.
do_shortcodes_in_html_tags() – Search only inside HTML elements for shortcodes and process them.
drop_index() – Drops a specified index from a table.
edit_form_image_editor() – Displays the image and editor in the post editor
Featured_Content::init() – Conditionally hook into WordPress.
file_is_displayable_image() – Validate that file is suitable for displaying within a web page.
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