(PHP 5 >= 5.1.0, PHP 7) Gets an index of iterators

(PHP 5 >= 5.2.0, PHP 7) Create a new RegexIterator

(PHP 5 >= 5.2.0, PHP 7) Returns the regular expression flags.

(PHP 5, PHP 7) Move to next entry public void

(PHP 5 >= 5.3.0, PHP 7) Has children public

(PHP 5 >= 5.3.0, PHP 7) Rewinds back to the beginning

(PHP 5 >= 5.2.0, PHP 7) Retrieve the contents of the cache

(PHP 5 >= 5.1.0, PHP 7) Returns whether current entry is an array or an object.

(PHP 5 >= 5.1.0, PHP 7) Check whether the current element is valid

(PHP 5 >= 5.1.0, PHP 7) Move the iterator forward