(PHP >= 5.4.0, PECL intl >= 2.0.0) Create an inverse transliterator

(PHP 5 >= 5.3.0, PHP 7, PECL enchant >= 0.1.0 ) Free a dictionary resource

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Get MIME charset string

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Returns a correctly ordered and delimited locale ID

(PHP 5 >= 5.3.0, PHP 7, PECL enchant >= 0.1.0 ) add 'word' to this spell-checking session

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

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Get the last error code

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Set/Get character encoding for multibyte regex

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Get behavior for handling repeating wall time

(No version information available, might only be in Git) Create break iterator for boundaries of code points