Iteradores
PHP Manual

A classe RecursiveIteratorIterator

Introdução

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Sinopse da classe

RecursiveIteratorIterator implements OuterIterator , Traversable , Iterator {
/* Métodos */
public void beginChildren ( void )
public void beginIteration ( void )
public RecursiveIterator callGetChildren ( void )
public bool callHasChildren ( void )
public __construct ( Traversable $iterator [, int $mode = RecursiveIteratorIterator::LEAVES_ONLY [, int $flags = 0 ]] )
mixed current ( void )
public void endChildren ( void )
public void endIteration ( void )
int getDepth ( void )
public iterator getInnerIterator ( void )
public mixed getMaxDepth ( void )
RecursiveIterator getSubIterator ( void )
mixed key ( void )
void next ( void )
public void nextElement ( void )
void rewind ( void )
public void setMaxDepth ([ string $max_depth = -1 ] )
bolean valid ( void )
}

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Iteradores
PHP Manual