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

    Опис

    public RecursiveArrayIterator::getChildren(): ?RecursiveArrayIterator

    Returns an iterator for the current iterator entry.

    Параметри

    У цієї функції немає параметрів.

    Значення, що повертаються

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

    Помилки/виключення

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

    Приклади

    Приклад #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();
    }
    ?>

    Поданий вище приклад виведе:

    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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