Iterators
PHP Manual

The EmptyIterator class

(PHP 5 >= 5.1.0)

Introduction

The EmptyIterator class for an empty iterator.

Class synopsis

EmptyIterator implements Iterator {
/* Methods */
public void current ( void )
public void key ( void )
public void next ( void )
public void rewind ( void )
public void valid ( void )
}

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Iterators
PHP Manual