(PHP >= 5.3.2, PECL intl >= 2.0.0) Get number of elements in the bundle

(PHP 7) Check if code point has the White_Space Unicode property

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Tell whether a day is a weekday, weekend or a day that has a transition

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Whether a certain date/time is in the weekend

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Check whether the given error code indicates failure

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Add the word to the wordlist in the current session

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.2, PHP 7, PECL idn >= 0.1) Convert domain name from IDNA ASCII

(PHP 4, PHP 5, PHP 7) Recode from file to file according to recode request

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Whether date/time interpretation is in lenient mode

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Setup string and regular expression for a multibyte regular expression match