is_wp_error( mixed $thing )

Checks if any scheduled tasks have been missed.

Checks if any scheduled tasks are late.

Runs a loopback test on the site.

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

Checks if site has page cache enabled or not.

Gets page cache details.

Tests if the site can communicate with WordPress.org.

Tests if scheduled events run as intended.

Tests if the REST API is accessible.

Tests if a full page cache is available.

Checks if the Authorize Application Password request is valid.

Check if the plugin can be overwritten and output the HTML for overwriting a plugin on upload.

Processes the post data for the bulk editing of attachments.

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

Check if the theme can be overwritten and output 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.

Checks if the user needs to update PHP.

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.

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

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

Validates the recovery mode cookie.

Gets the session identifier from the cookie.

Authenticates the user using an application password.

Handles checking for the recovery mode cookie and validating it.

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

Load the image produced by Ghostscript.

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

Dispatches the request to the callback handler.

Serves the batch/v1 request.

Checks whether the status is valid for the given post.

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.

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

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

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.

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.

Retrieves the list of sidebars (active or inactive).

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 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.

Performs a permissions check for the request.

Prepares the application password for the REST response.

Gets the requested application password for a user.

Deletes a single menu item.

Prepares a single post for create or update.

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

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.

Handle updating a plugin’s status.

Prepares a single theme output for response.

Sanitizes and validates the list of theme status.

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

Creates a single post.

Updates a single nav menu item.

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

Validates an object value based on a schema.

Validates an array value based on a schema.

Validates an integer value based on a schema.

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

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.

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

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

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

Gets a URL list for a taxonomy sitemap.

Inserts a new site into the database.

Updates a site in the database.

Gets the checksums for the given version of ClassicPress.

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.

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.

Handles sending a password retrieval email to a user.

Output the login page header.

Perform a HTTP HEAD or GET request.

Determines if the URL can be accessed over SSL.

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.

Create/update the nav_menu term for this setting.

Get original title.

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.

Resizes current image.

Create multiple smaller images from a single source.

Saves current in-memory image to file.

Updates meta values.

Prepares a meta value for output.

Sanitizes (where possible) the params on the request.

Checks whether this request is valid according to its attributes.

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

Retrieves a comment.

Creates a comment.

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 a comment author email for validity.

Handles serving a REST API request.

Matches the request to a callback and call it.

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

Deletes a single user.

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

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.

Deletes a single term from a taxonomy.

Prepares a value for output based off a schema array.

Updates settings for the settings object.

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

Creates a single attachment.

Updates a single attachment.

Handles an upload via raw POST data.

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

Checks if a given request has access to get revisions.

Gets a collection of revisions.

Retrieves one revision from the collection.

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

Deletes a single revision.

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

Updates the post’s terms from a REST request.

Prepares links for the request.

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

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

Retrieves a single post.

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.

Prepares a single post for create or update.

Outputs the content for the current RSS widget instance.

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

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

Resizes current image.

Create multiple smaller images from a single source.

Crops Image.

Rotates current image counter-clockwise by $angle.

Saves current image to file.

Sanitizes the widget form values as they are saved.

Updates widget settings asynchronously.

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

Retrieves the currently queried object.

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

Validates a single query.

Transforms a single query, from one field to another.

Retrieves a network from the database by its ID.

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.

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.

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

Determines whether the given ID is a navigation menu.

Determines whether the given ID is a nav menu item.

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

Returns a navigation menu object.

Sends a Trackback.

Updates an existing comment in the database.

Finds a pingback server URI based on the given URL.

Adds a new comment to the database.

Retrieves the maximum character lengths for the comment form fields.

Appends data to an XML response based on given arguments.

Displays a navigation menu.

Provides an edit link for posts and terms.

Retrieves single bookmark data item or field.

Schedules a recurring event.

Reschedules a recurring event.

Unschedules a previously scheduled event.

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

Schedules an event to run only once.

Unschedules all events attached to the hook.

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

Retrieves default data about the avatar.

Retrieves the adjacent post.

Retrieves the URL for editing a given term.

Retrieves the feed link for a term.

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

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

Retrieves a site from the database by its ID.

Returns a link to a post format index.

Updates a blog details field.

Send an HTTP request to a URI.

Dispatches a HTTP request to a supporting transport.

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

Registers a meta key.

Retrieve a single header by name from the raw response.

Retrieve only the response code from the raw response.

Retrieve only the response message from the raw response.

Retrieve only the body from the raw response.

Retrieve only the cookies from the raw response.

Retrieve only the headers from the raw response.

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

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

Handles registering a new user.

Updates a user in the database.

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

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

Retrieves the character set for the given column.

Retrieves the maximum string length allowed in a given column.

Strips any invalid characters from the query.

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

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

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

Authenticates a user using the email and password.

Constructor for WP_Theme.

Returns errors property.

Updates the custom_css post for a given theme.

Switches the theme.

Creates a new category.

Edits a comment.

Creates a new comment.

Creates a new post.

Creates a new post.

Edits a post.

Retrieves a pingback and registers it.

Logs user in.

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

Creates a new term.

Edits a term.

Deletes a term.

Retrieves a term.

Retrieves all terms for a taxonomy.

Edits user’s profile.

Displays the tags for a post.

Retrieves term description.

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

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

Retrieves term parents with separator.

Displays the terms for a post in a list.

Checks if the current post has any of given terms.

Displays a tag cloud.

Retrieves category link URL.

Retrieves post categories.

Retrieves category name based on category ID.

Publishes the values of a changeset.

Loads themes into the theme browsing/installation UI.

Gets changeset data.

Imports theme starter content into the customized state.

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

Validates setting values.

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

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

Saves the post for the loaded changeset.

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

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

Constructor.

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

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

Validate a value based on a schema.

Sanitize a value based on a schema.

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

Returns the ID of the post’s parent.

Queues posts for lazy-loading of term meta.

Updates a post with new post data.

Adds a new auto-draft post.

Ajax handler for adding a new auto-draft post.

Ajax handler for loading available menu items.

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

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

Adds a newly created user to the appropriate blog

Store basic site info in the blogs table.

Activates a signup.

Creates a user.

Creates a site.

Gets one of a user’s active blogs.

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

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

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

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.

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

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.

Retrieves the name of a category from its ID.

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

Gets an array of ancestor IDs for a given object.

Returns the term’s parent’s term ID.

Generates a permalink for a taxonomy term archive.

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

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

Updates term based on arguments provided.

Retrieves the cached term objects for the given object ID.

Removes a term from the database.

Adds a new term to the database.

Creates term and taxonomy relationships.

Removes term(s) associated with a given object.

Determines whether a taxonomy term exists.

Gets all term data from database by term ID.

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

Gets sanitized term field.

Sanitizes term for editing.

Creates or modifies a taxonomy object.

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

Restores a post to the specified revision.

Connects to a oEmbed provider and returns the result.

Process RSS feed widget data and optionally retrieve feed items.

Display the RSS entries in a list.

Validates an input.

Retrieve URL headers and content using WP HTTP Request API.

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

HTTP request for URI to retrieve content.

Retrieves HTTP Headers from URL.

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

Display second step of custom header image page.

Display third step of custom header image page.

Upgrade ClassicPress core display.

Display plugins text for the ClassicPress news widget.

Action to perform following a single theme update.

Crops an image to a given size.

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

Stores a message about the upgrade.

Performs autosave with heartbeat.

Displays the given administration message.

Outputs the legacy media upload form.

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

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().

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

Populate network settings.

Prints step 1 for Network installation process.

Prints step 2 for Network installation process.

Streams image in WP_Image_Editor to browser.

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

Retrieve translations from WordPress Translation API.

Get available translations from the ClassicPress.net API.

Download a language pack.

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

Returns the menu formatted to edit.

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.

Output JavaScript that calls function to decrement the update counts.

Retrieves popular ClassicPress plugin tags.

Displays the Featured tab of Add Plugins screen.

Displays plugin information in dialog box form.

Retrieves plugin installer pages from the ClassicPress.net Plugins API.

Check if a child theme is being installed and we need to install its parent.

Install a theme package.

Upgrade a theme.

Upgrade several themes at once.

Checks that the package source contains a valid theme.

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

Turn off maintenance mode after upgrading the active theme.

Delete the old theme during an upgrade.

Handles the link categories column output.

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

Displays theme information in dialog box form.

Upgrade ClassicPress core.

Ajax handler for erasing personal data.

Ajax handler for editing a theme or plugin file.

Ajax handler for exporting a user’s personal data.

Ajax handler for cropping an image.

Ajax handler for installing a theme.

Ajax handler for updating a theme.

Ajax handler for deleting a theme.

Ajax handler for installing a plugin.

Ajax handler for updating a plugin.

Ajax handler for deleting a plugin.

Ajax handler for getting themes from themes_api().

Ajax handler for saving posts from the fullscreen editor.

Ajax handler for quick edit saving for a term.

Ajax handler for uploading attachments

Ajax handler for replying to a comment.

Ajax handler for editing a comment.

Ajax handler for adding a menu item.

Ajax handler for adding meta.

Ajax handler for adding a user.

Ajax handler for adding a link category.

Ajax handler to add a tag.

Ajax handler for getting a tagcloud.

Ajax handler for adding a hierarchical term.

Ajax handler for deleting a tag.

Ajax handler for deleting a link.

Ajax handler to dim a comment.

Checks the version of the installed MySQL binary.

Connect to the filesystem.

Download a package.

Unpack a compressed package file.

Install a package.

Run an upgrade/installation.

Action to perform following a single theme install.

Action to perform following a single plugin update.

Updates an item, if appropriate.

If we tried to perform a core update, check if we should send an email, and if we need to avoid processing future updates.

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.

Upgrades the core of ClassicPress.

Process bulk actions.

Resend an existing request and return the result.

Handle list table actions.

Start the element output.

Removes a theme.

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

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

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.

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

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

Downloads a URL to a local temporary file using the ClassicPress 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.

Stores an error message about the upgrade.

Stores a message about the upgrade.

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

Action to perform following a plugin install.

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

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

Registers importer for ClassicPress.

Checks if the user needs a browser update.

Returns only allowed post data fields.

Updates an existing post with values provided in $_POST.

Processes the post data for the bulk editing of posts.

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

Calls wp_write_post() and handles the errors.

The RSS dashboard widget control.

Upgrade a plugin.

Bulk upgrade 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.

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

Install a plugin package.

Updates an existing Category or creates a new Category.

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