(PHP >= 5.4.0, PECL intl >= 2.0.0) Checks if a given text contains any suspicious characters

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

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Regular expression match for multibyte string

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Set/Get character encoding detection order

(PHP 5 >= 5.5.0, PHP 7, PECL intl >= 3.0.0) Get copy of formatterʼs calendar object

(PHP 4, PHP 5, PHP 7) Alias of

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Set/Get the default options for mbregex functions

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Returns an appropriately localized display name for language

(PHP 5 >= 5.3.0, PHP 7) Get aliases of a known encoding type

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Get the timezone-id used for the IntlDateFormatter