RecursiveArrayIterator::getChildren

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

RecursiveArrayIterator::getChildren — Returns an iterator for the current entry if it is an array or an object

Açıklama

public RecursiveArrayIterator::getChildren(): ?RecursiveArrayIterator

Returns an iterator for the current iterator entry.

Bağımsız Değişkenler

Bu işlevin bağımsız değişkeni yoktur.

Dönen Değerler

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

Hatalar/İstisnalar

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

Örnekler

Örnek 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();
}
?>

Yukarıdaki örneğin çıktısı:

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

Ayrıca Bakınız

RecursiveArrayIterator::hasChildren() - Returns whether current entry is an array or an object

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User Contributed Notes 1 note

down

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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