Inserts a comment into the database.

Checks whether auto-updates are enabled.

Check if maintenance mode is enabled.

Converts and fixes HTML entities.

Callback for wp_kses_normalize_entities() regular expression.

Determines whether to add the loading attribute to the specified tag in the specified context.

Sends an email, similar to PHP’s mail function.

Filters ‘img’ elements in post content to add ‘srcset’ and ‘sizes’ attributes.

Displays a navigation menu.

Adds a new comment to the database.