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RecursiveIteratorIterator::__construct

(PHP 5 >= 5.1.3, PHP 7, PHP 8)

RecursiveIteratorIterator::__constructConstruir 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

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User Contributed Notes 2 notes

up
1
Tom
10 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
up
-1
Matt Creenan
11 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.
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