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
    2
    814ckf0x
    11 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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