RecursiveArrayIterator::getChildren

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

RecursiveArrayIterator::getChildrenReturns an iterator for the current entry if it is an array or an object

Descrizione

public RecursiveArrayIterator::getChildren(): ?RecursiveArrayIterator

Returns an iterator for the current iterator entry.

Elenco dei parametri

Questa funzione non contiene parametri.

Valori restituiti

An iterator for the current entry, if it is an array or object; or null on failure.

Errori/Eccezioni

An InvalidArgumentException will be thrown if the current entry does not contain an array or an object.

Esempi

Example #1 RecursiveArrayIterator::getChildren() example

<?php
$fruits
= array("a" => "lemon", "b" => "orange", array("a" => "apple", "p" => "pear"));

$iterator = new RecursiveArrayIterator($fruits);

while (
$iterator->valid()) {

if (
$iterator->hasChildren()) {
// print all children
foreach ($iterator->getChildren() as $key => $value) {
echo
$key . ' : ' . $value . "\n";
}
} else {
echo
"No children.\n";
}

$iterator->next();
}
?>

Il precedente esempio visualizzerĂ :

No children.
No children.
a : apple
p : pear

Vedere anche:

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User Contributed Notes 1 note

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1
814ckf0x
10 years ago
RecursiveArrayIterator::getChildrens returns a copy of the children, not a reference:
<?php
$stack
= array ("some" => "value",
                array (
"subsome" => "subvalue", array ("subsubsome" => "subsubvalue")),
               
"some1" => "value1");

$object = new RecursiveArrayIterator ($stack);
$object->next ();
$second_object = &$object->getChildren ();

$second_object->next ();

$third_object = &$second_object->getChildren ();

$third_object->offsetSet ("subsubsome", "subsubdiferent");

var_dump ($object);
var_dump ($second_object);
var_dump ($third_object);
?>

returns:

object(RecursiveArrayIterator)#1 (1) {
  ["storage":"ArrayIterator":private]=>
  array(3) {
    ["some"]=>
    string(5) "value"
    [0]=>
    array(2) {
      ["subsome"]=>
      string(8) "subvalue"
      [0]=>
      array(1) {
        ["subsubsome"]=>
        string(11) "subsubvalue" <--- expected to be changed
      }
    }
    ["some1"]=>
    string(6) "value1"
  }
}
object(RecursiveArrayIterator)#2 (1) {
  ["storage":"ArrayIterator":private]=>
  array(2) {
    ["subsome"]=>
    string(8) "subvalue"
    [0]=>
    array(1) {
      ["subsubsome"]=>
      string(11) "subsubvalue" <--- expected to be changed
    }
  }
}
object(RecursiveArrayIterator)#3 (1) {
  ["storage":"ArrayIterator":private]=>
  array(1) {
    ["subsubsome"]=>
    string(14) "subsubdiferent"
  }
}
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