latest/apidoc/Iterator_8php_source.html

 <?php

 interface Iterator {
     public function current();

     public function key();

     public function next();

     public function rewind();

     public function valid();
 }
Iterator\current
current()

Iterator\next
next()

Iterator\valid
valid()

Iterator
Interface for external iterators or objects that can be iterated themselves internally.
Definition: Iterator.php:11

Iterator\rewind
rewind()

Iterator\key
key()