RecursiveIteratorIterator::__construct

(PHP 5 >= 5.1.3)

RecursiveIteratorIterator::__construct — Construir un objeto RecursiveIteratorIterator

Descripción

public RecursiveIteratorIterator::__construct ( Traversable $iterator [, int $mode = RecursiveIteratorIterator::LEAVES_ONLY [, int $flags = 0 ]] )

Crea un objeto RecursiveIteratorIterator desde un objeto RecursiveIterator.

Parámetros

iterator

El iterador desde el que va a ser construido. Puede ser un objeto RecursiveIterator o IteratorAggregate.

mode

Modo opcional. Los valores posibles son

RecursiveIteratorIterator::LEAVES_ONLY - El predeterminado. Lista sólo las hojas en la iteración.
RecursiveIteratorIterator::SELF_FIRST - Lista las hojas y los padres en la iteración con los padres primero.
RecursiveIteratorIterator::CHILD_FIRST - Lista las hojas y los padres en la iteración con las hojas primero.

flags

Bandera opcional. Los valore posibles son RecursiveIteratorIterator::CATCH_GET_CHILD que ignorará las excepciones lanzadas en llamadas a RecursiveIteratorIterator::getChildren().

Valores devueltos

No devuelve ningún valor.

Ejemplos

Ejemplo #1 Iterar un RecursiveIteratorIterator


<?php
$array = array(
    array(
        array(
            array(
                'leaf-0-0-0-0',
                'leaf-0-0-0-1'
            ),
            'leaf-0-0-0'
        ),
        array(
            array(
                'leaf-0-1-0-0',
                'leaf-0-1-0-1'
            ),
            'leaf-0-1-0'
        ),
        'leaf-0-0'
    )
);

$iterator = new RecursiveIteratorIterator(
    new RecursiveArrayIterator($array),
    $mode
);
foreach ($iterator as $key => $leaf) {
    echo "$key => $leaf", PHP_EOL;
}
?>

Salida con $mode = RecursiveIteratorIterator::LEAVES_ONLY

0 => leaf-0-0-0-0
1 => leaf-0-0-0-1
0 => leaf-0-0-0
0 => leaf-0-1-0-0
1 => leaf-0-1-0-1
0 => leaf-0-1-0
0 => leaf-0-0

Salida con $mode = RecursiveIteratorIterator::SELF_FIRST

0 => Array
0 => Array
0 => Array
0 => leaf-0-0-0-0
1 => leaf-0-0-0-1
1 => leaf-0-0-0
1 => Array
0 => Array
0 => leaf-0-1-0-0
1 => leaf-0-1-0-1
1 => leaf-0-1-0
2 => leaf-0-0

Salida con $mode = RecursiveIteratorIterator::CHILD_FIRST

0 => leaf-0-0-0-0
1 => leaf-0-0-0-1
0 => Array
1 => leaf-0-0-0
0 => Array
0 => leaf-0-1-0-0
1 => leaf-0-1-0-1
0 => Array
1 => leaf-0-1-0
1 => Array
2 => leaf-0-0
0 => Array

add a note User Contributed Notes RecursiveIteratorIterator::__construct - [2 notes]

down

Tom ¶

2 years ago


Note: the missing documentation of the argument list for this constructor is currently as follows (according to source code).



Param iter: see RecursiveIterator



Param mode:

- LEAVES_ONLY = (default) only iterate leaves

- SELF_FIRST = iterate parents prior to children

- CHILD_FIRST = iterate children prior to parents



Param flags:

- CATCH_GET_CHILD = ignore exceptions in getChildren() call

down

Matt Creenan ¶

3 years ago


Note that LEAVES_ONLY, SELF_FIRST and CHILD_FIRST do not work by themselves.



They are class constants so you need to use RecursiveIteratorIterator::LEAVES_ONLY, etc.

add a note