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PHP Manual

The IteratorIterator class

(PHP 5 >= 5.1.0)

简介

This iterator wrapper allows the conversion of anything that is Traversable into an Iterator. It is important to understand that most classes that do not implement Iterators have reasons as most likely they do not allow the full Iterator feature set. If so, techniques should be provided to prevent misuse, otherwise expect exceptions or fatal errors.

类摘要

IteratorIterator implements OuterIterator {
/* 方法 */
public __construct ( Traversable $iterator )
public mixed current ( void )
public Traversable getInnerIterator ( void )
public scalar key ( void )
public void next ( void )
public void rewind ( void )
public bool valid ( void )
}

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迭代器
PHP Manual