(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Sort array using specified collator and sort keys

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

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

(PHP 7) Get the property constant value for a given property name

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Get the lenient used for the IntlDateFormatter

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Get the objectʼs timezone

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) sets the default runtime locale

(No version information available, might only be in Git) Set the iterator position to index beyond the last

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Set collation attribute

(PHP 7) Make Unicode character uppercase public