Iterators
PHP Manual

The SimpleXMLIterator class

Introduction

The SimpleXMLIterator provides recursive iteration over all nodes of a SimpleXMLElement object.

Class synopsis

SimpleXMLIterator
SimpleXMLIterator extends SimpleXMLElement implements RecursiveIterator , Traversable , Iterator , Countable {
/* Methods */
mixed current ( void )
object getChildren ( void )
bool hasChildren ( void )
mixed key ( void )
void next ( void )
void rewind ( void )
bool valid ( void )
}

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Iterators
PHP Manual