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ArrayObject exchangeArray() function in PHP
  • Last Updated : 22 Mar, 2019

The exchangeArray() function of the ArrayObject class in PHP is used to exchange an array from an ArrayObject. That is, it replaces existing array from an ArrayObject with a newly described array.

Syntax:

ArrayObject exchangeArray( $inputArray )  

Parameters: This function accepts a single parameter $inputArray which is the new array with which the old array will be exchanged in the ArrayObject.

Return Value: This function returns the old array.

Below programs illustrate the above function:



Program 1:

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<?php
// PHP program to illustrate the
// exchangeArray() function
  
$arr = array("a" => "geeks", "b" => "are", "c" => "awesome");
  
// Create array object
$arrObject = new ArrayObject($arr);
  
// New Array
$newArr = array("1" => "New", "2" => "Array");
  
// Exchange arrays in ArrayObject
$arrObject->exchangeArray($newArr);
  
print_r($arrObject);
  
?>

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Output:

ArrayObject Object
(
    [storage:ArrayObject:private] => Array
        (
            [1] => New
            [2] => Array
        )

)

Program 2:

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<?php
// PHP program to illustrate the
// exchangeArray() function
  
$arr = array("a" => "Welcome", "b" => "2", "c" => "GFG");
  
// Create array object
$arrObject = new ArrayObject($arr);
  
// New Array
$newArr = array("1" => "Hello", "2" => "World");
  
// Exchange arrays in ArrayObject
$arrObject->exchangeArray($newArr);
  
print_r($arrObject);
  
?>

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Output:

ArrayObject Object
(
    [storage:ArrayObject:private] => Array
        (
            [1] => Hello
            [2] => World
        )

)

Reference: http://php.net/manual/en/arrayobject.exchangearray.php




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