is_wp_error( mixed $thing ): bool

Loads font collection data from a JSON file or URL.

Loads the font collection data from a JSON file URL.

Inject ignoredHookedBlocks metadata attributes into a template or template part.

Creates a font face for the parent font family.

Deletes a single font face.

Checks if a given request has access to a font face.

Validates settings when creating a font face.

Retrieves a collection of font faces within the parent font family.

Retrieves a single font face within the parent font family.

Prepares a single font family post for create or update.

Checks if a given request has access to a font family.

Validates settings when creating or updating a font family.

Prepare a single collection output for response.

Gets the font collections available.

Handles activating a plugin via AJAX.

Runs a remote HTTPS request to detect whether HTTPS supported, and stores potential errors.

Gets the autosave, if the ID is valid.

Checks if a given request has access to delete a revision.

Creates a Navigation Menu post from a Classic Menu.

Determines the most appropriate classic navigation menu to use as a fallback.

Gets (and/or creates) an appropriate fallback Navigation Menu.

Returns paginated revisions of the given global styles config custom post type.

Prepares the revision for the REST response.

Filters the blog option to return the path for the previewed theme.

Moves the plugin or theme being updated into a temporary backup directory.

Restores the plugin or theme from temporary backup.

Checks if site has page cache enabled or not.

Gets page cache details.

Tests if a full page cache is available.

Returns the url for viewing and potentially restoring revisions of a given post.

Returns the custom post type that contains the user’s origin config for the active theme or an empty array if none are found.

Gets the id of the menu that the given menu item belongs to.

Gets the nav menu item, if the ID is valid.

Creates a single nav menu item.

Updates a single nav menu item.

Deletes a single nav menu item.

Prepares a single nav menu item for create or update.

Checks if a given request has access to read a single global style.

Checks if a given request has access to write a single global styles config.

Prepares a single global styles config for update.

Prepares links for the request.

Retrieves the contents of the title tag from the HTML response.

Gets the term, if the ID is valid.

Creates a single term in a taxonomy.

Updates a single term from a taxonomy.

Deletes a single term from a taxonomy.

Output a ZIP file with an export of the current templates and template parts from the site editor, and close the connection.

Builds a unified template object based a post Object.

Retrieves a collection of widgets.

Creates a widget.

Updates an existing widget.

Retrieves the list of sidebars (active or inactive).

Prepares links for the request.

Updates a single template.

Creates a single template.

Search and retrieve block patterns metadata

Retrieves a single widget type from the collection.

Checks if a given request has access to read a widget type.

Generates a unique slug for templates.

Creates an array of theme styles to load into the block editor.

Retrieves a list of unified template objects based on a query.

Retrieves a single unified template object using its id.

Checks if a given request has access to get the currently used application password for a user.

Retrieves the application password being currently used for authentication of a user.

Runs a remote HTTPS request to detect whether HTTPS supported, and stores potential errors.

Validates an integer value based on a schema.

Validates that the given value is a member of the JSON Schema “enum”.

Validates an object value based on a schema.

Validates an array value based on a schema.

Serves the batch/v1 request.

Dispatches the request to the callback handler.

Performs a permissions check for the request.

Prepares the application password for the REST response.

Gets the requested application password for a user.

Checks if a given request has access to get application passwords.

Retrieves a collection of application passwords.

Checks if a given request has access to get a specific application password.

Retrieves one application password from the collection.

Checks if a given request has access to create application passwords.

Creates an application password.

Checks if a given request has access to update application passwords.

Updates an application password.

Checks if a given request has access to delete all application passwords for a user.

Deletes all application passwords for a user.

Checks if a given request has access to delete a specific application password for a user.

Deletes an application password for a user.

Checks whether the status is valid for the given post.

Load the image produced by Ghostscript.

Authenticates the user using an application password.

Finds the matching schema among the “anyOf” schemas.

Finds the matching schema among the “oneOf” schemas.

Checks for errors when using application password-based authentication.

Checks if the Authorize Application Password request is valid.

Search and retrieve blocks metadata

Handle updating a plugin’s status.

Retrieves a collection of plugins.

Checks if a given request has access to get a specific plugin.

Retrieves one plugin from the site.

Uploads a plugin and optionally activates it.

Checks if a given request has access to update a specific plugin.

Updates one plugin.

Checks if a given request has access to delete a specific plugin.

Deletes one plugin from the site.

Retrieves a specific block type.

Checks if a given request has access to read a block type.

Applies edits to a media item and creates a new attachment record.

Filters the response to remove any fields not available in the given context.

Gets a URL list for a taxonomy sitemap.

Checks if the plugin can be overwritten and outputs the HTML for overwriting a plugin on upload.

Checks if the theme can be overwritten and outputs the HTML for overwriting a theme on upload.

Turns on maintenance mode before attempting to background update an active plugin.

Turns off maintenance mode after upgrading an active plugin.

Runs the scheduled event to check and update the latest site health status for the website.

Inserts the attachment post in the database. Does not update the attachment meta.

Create an image sub-size and return the image meta data value for it.

Create an image sub-size and return the image meta data value for it.

Check if a JPEG image has EXIF Orientation tag and rotate it if needed.

Checks if any scheduled tasks are late.

Creates image sub-sizes, adds the new data to the image meta sizes array, and updates the image metadata.

Low-level function to create image sub-sizes.

Handles checking for the recovery mode cookie and validating it.

Validates the recovery mode cookie.

Gets the session identifier from the cookie.

Enters recovery mode when the user hits wp-login.php with a valid recovery mode link.

Tests if scheduled events run as intended.

Tests if the REST API is accessible.

Checks if any scheduled tasks have been missed.

Runs a loopback test on the site.

Tests if the site can communicate with WordPress.org.

Inserts a new site into the database.

Updates a site in the database.

Processes arguments passed to wp_die() consistently for its handlers.

Checks if the user needs to update PHP.

Returns only allowed post data fields.

Retrieves a collection of search results.

Prepares a single search result for response.

Sanitizes the list of subtypes, to ensure only subtypes of the passed type are included.

Prepares a single theme output for response.

Sanitizes and validates the list of theme status.

Checks if a given request has access to get autosaves.

Creates, updates or deletes an autosave revision.

Gets a collection of autosaves using wp_get_post_autosave.

Creates autosave for the specified post.

Validates attributes against the current block schema, populating defaulted and missing values.

Registers the default post meta boxes, and runs the do_meta_boxes actions.

Creates and logs a user request to perform a specific action.

Intercept personal data exporter page Ajax responses in order to assemble the personal data export file.

Process bulk actions.

Resend an existing request and return the result.

Handle list table actions.

Handles exporting a user’s personal data via AJAX.

Handles erasing personal data via AJAX.

Unschedules all events attached to the hook.

Loads themes into the theme browsing/installation UI.

Handles editing a theme or plugin file via AJAX.

Retrieves term parents with separator.

Sanitizes the widget form values as they are saved.

Handles Ajax requests for community events

Gets data about events near a particular location.

Sanitize a value based on a schema.

Validate a value based on a schema.

Parse a request argument based on details registered to the route.

Publishes the values of a changeset.

Saves the post for the loaded changeset.

Imports theme starter content into the customized state.

Gets changeset data.

Updates the custom_css post for a given theme.

Prepares a meta value for output.

Updates meta values.

Checks if a given request has access delete a user.

Deletes a single user.

Retrieves a single user.

Creates a single user.

Checks if a given request has access to update a user.

Updates a single user.

Checks if a given request has access to read a user.

Retrieves one revision from the collection.

Checks if a given request has access to delete a revision.

Deletes a single revision.

Handles an upload via multipart/form-data ($_FILES).

Checks if a given request has access to get revisions.

Gets a collection of revisions.

Handles an upload via raw POST data.

Creates a single attachment.

Updates a single attachment.

Checks if a given request has access to create an attachment.

Prepares a value for output based off a schema array.

Updates settings for the settings object.

Deletes a single term from a taxonomy.

Gets a single term from a taxonomy.

Creates a single term in a taxonomy.

Checks if a request has access to update the specified term.

Updates a single term from a taxonomy.

Checks if a request has access to delete the specified term.

Checks if a request has access to read or edit the specified term.

Prepares links for the request.

Sanitizes and validates the list of post statuses, including whether the user can query private statuses.

Updates the post’s terms from a REST request.

Prepares a single post for create or update.

Creates a single post.

Checks if a given request has access to update a post.

Updates a single post.

Checks if a given request has access to delete a post.

Deletes a single post.

Checks if a given request has access to read a post.

Retrieves a single post.

Updates the values of additional fields added to a data object.

Checks a comment author email for validity.

Checks if a given REST request has access to update a comment.

Updates a comment.

Checks if a given request has access to delete a comment.

Deletes a comment.

Checks if a given request has access to read the comment.

Retrieves a comment.

Creates a comment.

Adds a new auto-draft post.

Ajax handler for adding a new auto-draft post.

Get original title.

Validates setting values.

Prepares setting validity for exporting to the client (JS).

Validates an input.

Stores an error message about the upgrade.

Stores a message about the upgrade.

Handles deleting a plugin via AJAX.

Handles installing a theme via AJAX.

Handles updating a theme via AJAX.

Handles deleting a theme via AJAX.

Handles installing a plugin via AJAX.

Retrieves a site from the database by its ID.

Authenticates a user using the email and password.

Retrieves the maximum character lengths for the comment form fields.

Retrieves a network from the database by its ID.

Ensures a REST response is a response object (for consistency).

Retrieves only the cookies from the raw response.

Sanitizes (where possible) the params on the request.

Checks whether this request is valid according to its attributes.

Matches the request to a callback and call it.

Handles serving a REST API request.

Embeds the links from the data into the request.

Creates, stores, then returns a password reset key for user.

Handles the submission of a comment, usually posted to wp-comments-post.php via a comment form.

Create/update the nav_menu term for this setting.

Get the value emulated into a WP_Post and set up as a nav_menu_item.

Creates/updates the nav_menu_item post for this setting.

Ajax handler for loading available menu items.

Performs the post_type and taxonomy queries for loading available menu items.

Handles the link categories column output.

Handles cropping an image via AJAX.

Retrieves the maximum string length allowed in a given column.

For string fields, records the maximum string length that field can safely save.

Strips any invalid characters from the string for a given table and column.

Retrieves the character set for the given column.

Strips any invalid characters from the query.

Adds field charsets to field/value/format arrays generated by wpdb::process_field_formats().

Retrieves default data about the avatar.

Handles updating a plugin via AJAX.

Generates SQL JOIN and WHERE clauses for a “first-order” query clause.

Check if WordPress has access to the filesystem without asking for credentials.

Retrieve translations from WordPress Translation API.

Get available translations from the WordPress.org API.

Download a language pack.

Handles sending a password retrieval email to a user.

Outputs the login page header.

Displays the fields for the new user account registration form.

Shows a form for returning users to sign up for another site.

Validates a new site sign-up for an existing user.

Shows a form for a visitor to sign up for a new user account.

Shows a form for a user or visitor to sign up for a new site.

Generates and displays the Sign-up and Create Site forms.

Prints step 1 for Network installation process.

Prints step 2 for Network installation process.

Updates an item, if appropriate.

Checks whether to send an email and avoid processing future updates after attempting a core update.

Sends an email upon the completion or failure of a background core update.

Prepares and sends an email of a full log of background update results, useful for debugging and geekery.

Checks that the package source contains .mo and .po files.

Upgrades WordPress core.

Turns on maintenance mode before attempting to upgrade the active theme.

Turns off maintenance mode after upgrading the active theme.

Deletes the old theme during an upgrade.

Upgrades several plugins at once.

Checks that the source package contains a valid plugin.

Deactivates a plugin before it is upgraded.

Deletes the old plugin during an upgrade.

Checks if a child theme is being installed and its parent also needs to be installed.

Install a theme package.

Upgrades a theme.

Upgrades several themes at once.

Checks that the package source contains a valid theme.

Install a plugin package.

Upgrades a plugin.

Connects to the filesystem.

Downloads a package.

Unpacks a compressed package file.

Install a package.

Runs an upgrade/installation.

Removes a theme.

Retrieves list of WordPress theme features (aka theme tags).

Retrieves theme installer pages from the WordPress.org Themes API.

Retrieves the list of WordPress theme features (aka theme tags).

Displays theme information in dialog box form.

Stores a message about the upgrade.

Performs an action following a single theme update.

Performs an action following a plugin install.

Performs an action following a single theme install.

Performs an action following a bulk update.

Performs an action following a single plugin update.

Outputs JavaScript that calls function to decrement the update counts.

Displays an error message about the update.

Displays an error message about the update.

Streams image in post to browser, along with enqueued changes in $_REQUEST['history'].

Saves image to post, along with enqueued changes in $_REQUEST['history'].

Streams image in WP_Image_Editor to browser.

Performs autosave with heartbeat.

Displays the given administration message.

Populate network settings.

Updates an existing Category or creates a new Category.

Gets comma-separated list of terms available to edit for the given post ID.

Gets and caches the checksums for the given version of WordPress.

Generates attachment meta data and create image sub-sizes for images.

Checks if the user needs a browser update.

Retrieves plugin installer pages from the WordPress.org Plugins API.

Retrieves popular WordPress plugin tags.

Displays the Featured tab of Add Plugins screen.

Displays plugin information in dialog box form.

Crops an image to a given size.

Sets up the RSS dashboard widget control and $args to be used as input to wp_widget_rss_form() .

Display plugins text for the WordPress news widget.

Checks the version of the installed MySQL binary.

Attempts activation of plugin in a “sandbox” and redirects on success.

Activates multiple plugins.

Removes directory and files of a plugin for a list of plugins.

Validates active plugins.

Outputs the legacy media upload form for a given media type.

Outputs the legacy media upload form.

Handles the process of uploading media.

Downloads an image from the specified URL, saves it as an attachment, and optionally attaches it to a post.

Saves a file submitted from a POST request and create an attachment post for it.

Handles a side-loaded file in the same way as an uploaded file is handled by media_handle_upload() .

Creates autosave data for the specified post from $_POST data.

Saves a draft or manually autosaves for the purpose of showing a post preview.

Creates a new post from the “Write Post” form using $_POST information.

Calls wp_write_post() and handles the errors.

Updates an existing post with values provided in $_POST.

Processes the post data for the bulk editing of posts.

Handles getting themes from themes_api() via AJAX.

Handles uploading attachments via AJAX.

Handles saving posts from the fullscreen editor via AJAX.

Handles adding a menu item via AJAX.

Handles adding meta via AJAX.

Handles adding a user via AJAX.

Handles Quick Edit saving for a term via AJAX.

Handles adding a hierarchical term via AJAX.

Handles deleting a tag via AJAX.

Handles deleting a link via AJAX.

Handles dimming a comment via AJAX.

Handles adding a link category via AJAX.

Handles adding a tag via AJAX.

Handles getting a tagcloud via AJAX.

Handles replying to a comment via AJAX.

Handles editing a comment via AJAX.

Upgrades the core of WordPress.

Start the element output.

Saves nav menu items.

Prints the appropriate response to a menu quick search.

Displays a meta box for a post type menu item.

Displays a meta box for a taxonomy menu item.

Returns the menu formatted to edit.

Displays a form to the user to request for their FTP/SSH details in order to connect to the filesystem.

Downloads a URL to a local temporary file using the WordPress HTTP API.

Unzips a specified ZIP file to a location on the filesystem via the WordPress Filesystem Abstraction.

Copies a directory from one location to another via the WordPress Filesystem Abstraction.

Initializes and connects the WordPress Filesystem Abstraction classes.

Registers importer for WordPress.

Gets attachment uploaded by Media Manager, crops it, then saves it as a new object. Returns JSON-encoded object details.

Retrieves the contributor credits.

Displays second step of custom header image page.

Displays third step of custom header image page.

Upgrades WordPress core display.

Maps a capability to the primitive capabilities required of the given user to satisfy the capability being checked.

Handles customize_save WP Ajax request to save/update a changeset.

Returns the sanitized value for a given setting from the current customized state.

Schedules a recurring event.

Reschedules a recurring event.

Unschedules a previously scheduled event.

Unschedules all events attached to the hook with the specified arguments.

Sends a request to run cron through HTTP request that doesn’t halt page loading.

Schedules an event to run only once.

Retrieves a post’s terms as a list with specified format.

Displays the terms for a post in a list.

Checks if the current post has any of given terms.

Displays a tag cloud.

Displays the tags for a post.

Retrieves term description.

Retrieves the terms of the taxonomy that are attached to the post.

Retrieves category link URL.

Retrieves post categories.

Retrieves category name based on category ID.

Switches the theme.

Sanitizes various option values based on the nature of the option.

Retrieves the avatar <img> tag for a user, email address, MD5 hash, comment, or post.

Emails login credentials to a newly-registered user.

Authenticates a user, confirming the login credentials are valid.

Scale down an image to fit a particular size and save a new copy of the image.

Check that the user login name and password is correct.

Retrieve category children list separated before and after the term IDs.

Returns errors property.

Constructor for WP_Theme.

Retrieves the currently queried object.

Retrieves the name of a category from its ID.

Updates category structure to old pre-2.3 from new taxonomy structure.

Resizes current image.

Crops Image.

Create multiple smaller images from a single source.

Rotates current image counter-clockwise by $angle.

Saves current image to file.

Retrieves a list of category objects.

Retrieves category data given a category ID or category object.

Retrieves a category based on URL containing the category slug.

Loads image from $this->file into new Imagick Object.

Sets Image Compression quality on a 1-100% scale.

Sets the database table prefix and the format specifiers for database table columns.

Dispatches a HTTP request to a supporting transport.

Send an HTTP request to a URI.

Determines if the URL can be accessed over SSL.

Sends a JSON response back to an Ajax request, indicating failure.

HTTP request for URI to retrieve content.

Retrieves HTTP Headers from URL.

Perform a HTTP HEAD or GET request.

Outputs the content for the current RSS widget instance.

Displays the RSS entries in a list.

Processes RSS feed widget data and optionally retrieve feed items.

Constructor.

Validates a single query.

Transforms a single query, from one field to another.

Returns the term’s parent’s term ID.

Retrieves the cached term objects for the given object ID.

Gets the subset of $terms that are descendants of $term_id.

Generates a permalink for a taxonomy term archive.

Determines if the given object is associated with any of the given terms.

Gets an array of ancestor IDs for a given object.

Makes term slug unique, if it isn’t already.

Updates term based on arguments provided.

Adds a new term to the database.

Creates term and taxonomy relationships.

Removes term(s) associated with a given object.

Removes a term from the database.

Gets sanitized term field.

Sanitizes term for editing.

Determines whether a taxonomy term exists.

Gets all term data from database by term field and data.

Creates or modifies a taxonomy object.

Gets all term data from database by term ID.

Retrieves the adjacent post.

Retrieves the feed link for a term.

Retrieves the URL for editing a given term.

Retrieves the full permalink for the current post or post ID.

Appends data to an XML response based on given arguments.

Checks WordPress version against the newest version.

Checks for available updates to plugins based on the latest versions hosted on WordPress.org.

Checks for available updates to themes based on the latest versions hosted on WordPress.org.

Retrieves only the headers from the raw response.

Retrieves a single header by name from the raw response.

Retrieves only the response code from the raw response.

Retrieves only the response message from the raw response.

Retrieves only the body from the raw response.

Connects to an oEmbed provider and returns the result.

Provides an edit link for posts and terms.

Updates a user in the database.

Handles registering a new user.

Authenticates and logs a user in with ‘remember’ capability.

Authenticates a user, confirming the username and password are valid.

Checks a users login information and logs them in if it checks out. This function is deprecated.

Resizes current image.

Create multiple smaller images from a single source.

Saves current in-memory image to file.

Displays a navigation menu.

Retrieves an array of the class names for the post container element.

Retrieves an array of the class names for the body element.

Returns the ID of the post’s parent.

Updates a post with new post data.

Redirects incoming links to the proper URL based on the site url.

Inserts post data into the posts table as a post revision.

Restores a post to the specified revision.

Adds a new user to a blog by visiting /newbloguser/{key}/.

Adds a newly created user to the appropriate blog

Activates a signup.

Creates a user.

Creates a site.

Store basic site info in the blogs table.

Gets one of a user’s active blogs.

Adds a user to a blog, along with specifying the user’s role.

Retrieves single bookmark data item or field.

Returns a link to a post format index.

Updates a blog details field.

Updates the details for a blog and the blogs table for a given blog ID.

Decorates a menu item object with the shared navigation menu item properties.

Determines whether the given ID is a nav menu item.

Deletes a navigation menu.

Saves the properties of a menu or create a new menu with those properties.

Saves the properties of a menu item or create a new one.

Returns a navigation menu object.

Determines whether the given ID is a navigation menu.

Retrieve URL headers and content using WP HTTP Request API.

Retrieves a pingback and registers it.

Edits a post.

Creates a new post.

Creates a new post.

Edits a comment.

Creates a new comment.

Creates a new category.

Creates a new term.

Edits a term.

Deletes a term.

Retrieves a term.

Retrieves all terms for a taxonomy.

Edits user’s profile.

Helper method for wp_newPost() and wp_editPost(), containing shared logic.

Logs user in.

Updates widget settings asynchronously.

Sends a Trackback.

Adds a new comment to the database.

Updates an existing comment in the database.

Finds a pingback server URI based on the given URL.

Registers a meta key.