(PHP >= 5.4.0, PECL intl >= 2.0.0) Get transliterator IDs

(PHP 5 >= 5.3.0, PHP 7) Get aliases of a known encoding type

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Create GMT (UTC) timezone

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Clear a field or all fields

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Callback function converts character encoding in output buffer

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

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Get current collation strength

(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1) Check if this zone has the same rules and offset as another zone

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Get truncated string with specified width

(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0) Parse string to a timestamp value