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

(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 >= 5.2.0, PHP 7) Finds first occurrence of a string within another

(PECL gender >= 0.9.0) Get similar names.

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

(PHP 5, PHP 7) Returns the character count of string

(PHP 7) Check if code point is a control character

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

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

(PHP 5 >= 5.3.11, PHP 7, PECL intl >= 1.0.3) Get sorting key for a string