ArrayObject::exchangeArray

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

    ArrayObject::exchangeArray — Exchange 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

    up
    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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