A very important thing to note about \RecursiveIteratorIterator is that it returns a flattened array when used with the iterator_to_array function. Ex:
<?php
$arr = array('Zero', 'name'=>'Adil', 'address' => array( 'city'=>'Dubai', 'tel' => array('int' => 971, 'tel'=>12345487)), '' => 'nothing');
$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr));
var_dump(iterator_to_array($iterator,true));
?>
This code will return :
array(6) {
[0]=>
string(4) "Zero"
["name"]=>
string(4) "Adil"
["city"]=>
string(5) "Dubai"
["int"]=>
int(91)
["tel"]=>
int(12345487)
[""]=>
string(7) "nothing"
}
To get the non-flattened proper array use the getArrayCopy() method, like so :
$iterator->getArrayCopy()
This will return
array(4) {
[0]=>
string(4) "Zero"
["name"]=>
string(4) "Adil"
["address"]=>
array(2) {
["city"]=>
string(5) "Dubai"
["tel"]=>
array(2) {
["int"]=>
int(91)
["tel"]=>
int(12345487)
}
}
[""]=>
string(7) "nothing"
}
RecursiveIteratorIterator::beginChildren
RecursiveFilterIterator::hasChildren
[edit] Last updated: Fri, 25 May 2012
RecursiveFilterIterator::hasChildren
[edit] Last updated: Fri, 25 May 2012
La clase RecursiveIteratorIterator
(PHP 5)
Introducción
Se puede usar para iterar a través de iteradores recursivos.
Sinopsis de la Clase
/* Constantes */
/* Métodos */
public __construct
( Traversable
$iterator
[, int $mode = RecursiveIteratorIterator::LEAVES_ONLY
[, int $flags = 0
]] )/* Métodos heredados */
}Constantes predefinidas
-
RecursiveIteratorIterator::LEAVES_ONLY -
RecursiveIteratorIterator::SELF_FIRST -
RecursiveIteratorIterator::CHILD_FIRST -
RecursiveIteratorIterator::CATCH_GET_CHILD
Tabla de contenidos
- RecursiveIteratorIterator::beginChildren — Inicio del hijo
- RecursiveIteratorIterator::beginIteration — Inicio de la iteración
- RecursiveIteratorIterator::callGetChildren — Obtener hijo
- RecursiveIteratorIterator::callHasChildren — Comprueba si tiene hijos
- RecursiveIteratorIterator::__construct — Construir un objeto RecursiveIteratorIterator
- RecursiveIteratorIterator::current — Acceder al valor del elemento actual
- RecursiveIteratorIterator::endChildren — Final de los hijos
- RecursiveIteratorIterator::endIteration — Final de la iteración
- RecursiveIteratorIterator::getDepth — Obtener la profundidad actual de la iteración recursiva
- RecursiveIteratorIterator::getInnerIterator — Obtener el iterador interno
- RecursiveIteratorIterator::getMaxDepth — Obtener el máximo de profundidad
- RecursiveIteratorIterator::getSubIterator — El sub iterador actual
- RecursiveIteratorIterator::key — Acceder a la clave actual
- RecursiveIteratorIterator::next — Moverse al siguiente elemento
- RecursiveIteratorIterator::nextElement — Siguiente elemento
- RecursiveIteratorIterator::rewind — Rebobina el iterador al primer elemento al nivel superior del iterador interno
- RecursiveIteratorIterator::setMaxDepth — Establecer el máximo de profundidad
- RecursiveIteratorIterator::valid — Comprueba si la posición actual es válida
RecursiveIteratorIterator::beginChildren
RecursiveFilterIterator::hasChildren
[edit] Last updated: Fri, 25 May 2012
RecursiveFilterIterator::hasChildren
[edit] Last updated: Fri, 25 May 2012
add a note
User Contributed Notes
RecursiveIteratorIterator
Adil Baig @ AIdezigns
23-Jun-2011 11:17
Tom
06-Jan-2011 01:35
This class operates on a tree of elements, which is build by nesting recursive iterators into one another.
Thus you might say it is an iterator over iterators. While traversing those, the class pushes the iterators on a stack while traversing down to a leaf and removes them from the stack while going back up.
aidan at php dot net
29-Apr-2010 09:57
This example demonstrates using the getDepth() method with a RecursiveArrayIterator.
<?php
$tree = array();
$tree[1][2][3] = 'lemon';
$tree[1][4] = 'melon';
$tree[2][3] = 'orange';
$tree[2][5] = 'grape';
$tree[3] = 'pineapple';
print_r($tree);
$arrayiter = new RecursiveArrayIterator($tree);
$iteriter = new RecursiveIteratorIterator($arrayiter);
foreach ($iteriter as $key => $value) {
$d = $iteriter->getDepth();
echo "depth=$d k=$key v=$value\n";
}
?>
The output of this would be:
Array
(
[1] => Array
(
[2] => Array
(
[3] => lemon
)
[4] => melon
)
[2] => Array
(
[3] => orange
[5] => grape
)
[3] => pineapple
)
depth=2 k=3 v=lemon
depth=1 k=4 v=melon
depth=1 k=3 v=orange
depth=1 k=5 v=grape
depth=0 k=3 v=pineapple
Michiel Brandenburg
14-Jun-2009 04:40
You can use this to quickly find all the files (recursively) in a certain directory. This beats maintaining a stack yourself.
<?php
$directory = "/tmp/";
$fileSPLObjects = new RecursiveIteratorIterator(
new RecursiveDirectoryIterator($directory),
RecursiveIteratorIterator::CHILD_FIRST
);
try {
foreach( $fileSPLObjects as $fullFileName => $fileSPLObject ) {
print $fullFileName . " " . $fileSPLObject->getFilename() . "\n";
}
}
catch (UnexpectedValueException $e) {
printf("Directory [%s] contained a directory we can not recurse into", $directory);
}
?>
Note: if there is a directory contained within the directory you are searching in that you have no access to read an UnexpectedValueException will be thrown (leaving you with an empty list).
Note: objects returned are SPLFileObjects
crashrox at gmail dot com
19-Dec-2008 09:51
Recursive multidimensional array flatten using SPL
<?php
function array_flatten_recursive($array) {
if($array) {
$flat = array();
foreach(new RecursiveIteratorIterator(new RecursiveArrayIterator($array), RecursiveIteratorIterator::SELF_FIRST) as $key=>$value) {
if(!is_array($value)) {
$flat[] = $value;
}
}
return $flat;
} else {
return false;
}
}
$array = array(
'A' => array('B' => array( 1, 2, 3, 4, 5)),
'C' => array( 6,7,8,9)
);
print_r(array_flatten_recursive($array));
?>
-- Returns:
Array (
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
[6] => 7
[7] => 8
[8] => 9
)