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

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 visualizzerà:

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

Vedere anche:

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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