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

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    User Contributed Notes 1 note

    up
    3
    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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