(PHP 5 >= 5.3.0, PHP 7) Serialize public string

(PHP 5 >= 5.0.0, PHP 7) Return current array entry

(PHP 5 >= 5.2.0, PHP 7) User defined sort

(PHP 5 >= 5.3.0, PHP 7) Unserialize public

(PHP 5 >= 5.0.0, PHP 7) Seek to position public

(PHP 5 >= 5.1.0, PHP 7) Get flags public void

(PHP 5 >= 5.0.0, PHP 7) Unset value for an offset

(PHP 5 >= 5.0.0, PHP 7) Return current array key

(PHP 5 >= 5.2.0, PHP 7) User defined sort

(PHP 5 >= 5.0.0, PHP 7) Check whether array contains more entries