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    ArrayObject::exchangeArray

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

    ArrayObject::exchangeArray — Заменить массив на другой

    Описание

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

    Заменяет текущий массив (array) на другой массив (array) или объект (object).

    Список параметров

    array

    Новый массив (array) или объект (object) для замены текущего массива.

    Возвращаемые значения

    Возвращает старый массив (array).

    Примеры

    Пример #1 Пример использования ArrayObject::exchangeArray()

    <?php
    // Массив с количеством фруктов
    $fruits = array("lemons" => 1, "oranges" => 4, "bananas" => 5, "apples" => 10);
    // Массив мест в Европе
    $locations = array('Amsterdam', 'Paris', 'London');

    $fruitsArrayObject = new ArrayObject($fruits);

    // Сейчас заменим фрукты на места
    $old = $fruitsArrayObject->exchangeArray($locations);
    print_r($old);
    print_r($fruitsArrayObject);

    ?>

    Результат выполнения приведённого примера: 

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

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    User Contributed Notes 3 notes

    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
                )
    )
    ?>
    up
    6
    Dmitri Snytkine
    15 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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