ArrayObject::exchangeArray

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

ArrayObject::exchangeArrayExchange the array for another one

Descrizione

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

Exchange the current array with another array or object.

Elenco dei parametri

array

The new array or object to exchange with the current array.

Valori restituiti

Returns the old array.

Esempi

Example #1 ArrayObject::exchangeArray() example

<?php
// Array of available fruits
$fruits = array("lemons" => 1, "oranges" => 4, "bananas" => 5, "apples" => 10);
// Array of locations in Europe
$locations = array('Amsterdam', 'Paris', 'London');

$fruitsArrayObject = new ArrayObject($fruits);

// Now exchange fruits for locations
$old = $fruitsArrayObject->exchangeArray($locations);
print_r($old);
print_r($fruitsArrayObject);

?>

Il precedente esempio visualizzerà:

Array
(
    [lemons] => 1
    [oranges] => 4
    [bananas] => 5
    [apples] => 10
)
ArrayObject Object
(
    [0] => Amsterdam
    [1] => Paris
    [2] => London
)

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User Contributed Notes 1 note

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4
Corentin Larose
10 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
)
)
?>
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