(PHP 7) Perform case folding on a code point

(PHP 7) Check if code point is a whitespace character according to ICU

(PHP 7) Get the combining class of a code point

(PHP 7) Return Unicode character by code point value

(PHP 7) Get the decimal digit value of a code point for a given radix

(PHP 7) Check if code point is a lowercase letter

(PHP 7) Get the "mirror-image" character for a code point

(PHP 7) Check if code point has the Bidi_Mirrored property

(PHP 7) Check if code point has the general category "Lu" (uppercase letter)

(PHP 7) Check if code point is permissible as the first character in a Java identifier