ArrayObject::exchangeArray

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

ArrayObject::exchangeArray — Exchange the array for another one

说明

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

Exchange the current array with another array or object.

参数

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

返回值

Returns the old array.

示例

示例 #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);
var_dump($old);
var_dump($fruitsArrayObject);

?>

以上示例会输出：

array(4) {
  ["lemons"]=>
  int(1)
  ["oranges"]=>
  int(4)
  ["bananas"]=>
  int(5)
  ["apples"]=>
  int(10)
}
object(ArrayObject)#1 (1) {
  ["storage":"ArrayObject":private]=>
  array(3) {
    [0]=>
    string(9) "Amsterdam"
    [1]=>
    string(5) "Paris"
    [2]=>
    string(6) "London"
  }
}

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Corentin Larose ¶

11 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:<?phpclass 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        ))?>