Function: Sanitizes a multiline string from user input or from the database.

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

Function: Maps a function to all non-iterable elements of an array or an object.

Function: Parses a string into variables to be stored in an array.

Function: Converts lone less than signs.

Function: Callback function used by preg_replace.

Function: WordPress implementation of PHP sprintf() with filters.

Function: Escaping for HTML attributes.

Function: Escaping for textarea values.

Function: Escapes an HTML tag name.