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

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Whether the objectʼs time is in Daylight Savings Time

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Whether this objectʼs time is before that of the passed object

(PHP 7) Get bidirectional category value for a code point

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Whether a field is set

(No version information available, might only be in Git) Set the iterator position to the first boundary before

(PHP 7) Check if code point is punctuation character

(PHP 7) Check if code point is permissible in a Java identifier

(PHP 5 >= 5.2.0, PHP 7) Finds position of first occurrence of a string within another, case insensitive

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Set behavior for handling skipped wall times at positive timezone offset