ArrayObject offsetSet() Function in PHP

The offsetSet() function of the ArrayObject class in PHP is used to update the value present at a specific index in the ArrayObject.

Syntax:

void offsetSet($index, $val) 

Parameters: This function accepts two parameters $index and $val. This function updates the value present at the index, $index with $val.

Return Value: This function does not returns any value.

Below programs illustrate the above function:

Program 1:

<?php
// PHP program to illustrate the
// offsetSet() function

$arr = array("geeks100", "geeks99", "geeks1", "geeks02");

// Create array object
$arrObject = new ArrayObject($arr);

// Update the value at index 1
$arrObject->offsetSet(1, "Updated");

// Print the updated ArrayObject
print_r($arrObject);

?>

Output:

ArrayObject Object
(
    [storage:ArrayObject:private] => Array
        (
            [0] => geeks100
            [1] => Updated
            [2] => geeks1
            [3] => geeks02
        )

)

Program 2:

<?php
// PHP program to illustrate the
// offsetSet() function

$arr = array("Welcome"=>"1", "to" => "2", "GfG" => "3");

// Create array object
$arrObject = new ArrayObject($arr);

// Update the value at index "to"
$arrObject->offsetSet("to", "UpdatedValue");

// Print the updated ArrayObject
print_r($arrObject);

?>

Output:

ArrayObject Object
(
    [storage:ArrayObject:private] => Array
        (
            [Welcome] => 1
            [to] => UpdatedValue
            [GfG] => 3
        )

)

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