Navigates through an array, object, or scalar, and raw-encodes the values to be used in a URL.

Remove custom background support.

Remove image header support.

Sanitizes a hex color.

Sanitizes a hex color without a hash. Use sanitize_hex_color() when possible.

Sanitizes space or carriage return separated URLs that are used to send trackbacks.

Send Access-Control-Allow-Origin and related headers if the current request is from an allowed origin.

Sets the scheme for a URL.

Checks if a term is an ancestor of another term.

Alias of update_post_cache().