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ArrayObject::exchangeArray

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

ArrayObject::exchangeArrayRemplace un tableau par un autre

Description

public ArrayObject::exchangeArray(array|object $array): array

Remplace le tableau courant par un autre tableau ou un objet.

Liste de paramètres

array

Le nouveau tableau ou objet à utiliser.

Valeurs de retour

Retourne l'ancien tableau.

Exemples

Exemple #1 Exemple avec ArrayObject::exchangeArray()

<?php
// Tableaux de fruits
$fruits = array("citrons" => 1, "oranges" => 4, "bananes" => 5, "pommes" => 10);
// Tableau de villes en Europe
$locations = array('Amsterdam', 'Paris', 'Londres');

$fruitsArrayObject = new ArrayObject($fruits);

// Échange des fruits par des villes
$old = $fruitsArrayObject->exchangeArray($locations);
print_r($old);
print_r($fruitsArrayObject);

?>

L'exemple ci-dessus va afficher :

Array
(
    [citrons] => 1
    [oranges] => 4
    [bananes] => 5
    [pommes] => 10
)
ArrayObject Object
(
    [storage:ArrayObject:private] => Array
        (
            [0] => Amsterdam
            [1] => Paris
            [2] => Londres
        )

)

add a note

User Contributed Notes 3 notes

up
4
Corentin Larose
9 years ago
It's worth notting that ArrayObject::exchangeArray() doesn't call ArrayObject::offsetSet() internally for each offset/property of the array/object provided in argument.

It's also worth noting the let's say "unexpected" behavior of get/set:

<?php
class MyArrayObject extends ArrayObject
{
public function
offsetSet($name, $value)
{
parent::offsetSet($name . '_control', $value);
parent::offsetSet($name, $value);
}
}

$test = new MyArrayObject();
$test->setFlags(\ArrayObject::ARRAY_AS_PROPS);
$test['my_value_1'] = 1;
$test['my_value_1'] = $test['my_value_1'] + 1;
$test['my_value_1'] += 1;
$test['my_value_1'] ++;
++
$test['my_value_1'];

$test->my_value_2 = 1;
$test->my_value_2 = $test->my_value_2 + 1;
$test->my_value_2 += 1;
$test->my_value_2 ++;
++
$test->my_value_2;

print_r($test);

// Prints out:
MyArrayObject Object
(
[
storage:ArrayObject:private] => Array
(
[
my_value_1_control] => 3
[my_value_1] => 5
[my_value_2_control] => 2
[my_value_2] => 5
)
)
?>
up
6
Dmitri Snytkine
14 years ago
It seems that input array is always passed by reference.
For example if you have an existing array
$array with some values
then you have an arrayobject $o
and then you do this:
$o->exchangeArray($array);
$o->offsetSet('somekey', 'some value');

Now if you check your $array array, it will have
a key 'somekey' with value of 'some value'

I totally did not expect that, I am sure it was a mistake to pass array by reference by default.
up
0
ievgen dot varava at spryker dot com
3 years ago
Looks like PHP8 brings undocumented change to this method signature. Example:

<?php
interface intA {
public function
exchangeArray($param);
}

class
classB extends ArrayObject implements intA {}
?>

PHP 7.4.13: no errors

PHP 8.0.0: Fatal error: Declaration of ArrayObject::exchangeArray(object|array $array) must be compatible with intA::exchangeArray($param)
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