(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Compare two Unicode strings

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Find position (in grapheme units) of first occurrence of a

(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) Get string length in grapheme units

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

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