Filters out register_meta() args based on an allowed list.

Converts a number of special characters into their HTML entities.

Adds an array of options to the list of allowed options.

Walks the array while sanitizing the contents.

Adds an array of options to the list of allowed options.

Registers theme support for a given feature.

Outputs a complete commenting form for use within a template.

Creates the initial theme features when the ‘setup_theme’ action is fired.

Update a comment with values provided in $_POST.

Escaping for XML blocks.