(PHP 4 >= 4.2.0, PHP 5, PHP 7) Retrieve the result from the last multibyte regular expression match

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Get last error code on the object

(PHP >= 5.4.0, PECL intl >= 2.0.0) Locales to use when running checks

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

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

(PHP 5 >= 5.3.0, PHP 7, PECL enchant >= 0.1.0 ) Whether a dictionary exists or not. Using non-empty tag

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Set the leniency of the parser

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Get the destination converter type

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Get minimal number of days the first week in a year or month can have

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