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PHP | ArrayIterator offsetSet() Function

Last Updated : 20 Nov, 2019
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The ArrayIterator::offsetSet() function is an inbuilt function in PHP which is used to set the value for an offset. Syntax: 
void ArrayIterator::offsetSet( mixed $index, mixed $newval )
Parameters: This function accepts two parameters as mentioned above and described below:
  • $index: This parameter holds the index to set the offset.
  • $newval: This parameter holds the new value to store at given index.
Return Value: This function does not return any value. Below programs illustrate the ArrayIterator::offsetSet() function in PHP: Program 1: php 
<?php

// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array(
        "a" => 4,
        "b" => 2,
        "g" => 8,
        "d" => 6,
        "e" => 1,
        "f" => 9
    )
);

// Update the value at index 1 
$arrItr->offsetSet("g", "Geeks"); 
  
// Print the updated ArrayObject 
print_r($arrItr); 

?>
Output: 
ArrayIterator Object
(
    [storage:ArrayIterator:private] => Array
        (
            [a] => 4
            [b] => 2
            [g] => Geeks
            [d] => 6
            [e] => 1
            [f] => 9
        )

)
Program 2: php 
<?php
   
// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array(
        "for", "Geeks", "Science",
        "Geeks", "Portal", "Computer"
    )
);
  
// Update the value at index 1 
$arrItr->offsetSet(1, "GeeksforGeeks"); 
  
// Print the updated ArrayObject 
print_r($arrItr); 

?>
Output: 
ArrayIterator Object
(
    [storage:ArrayIterator:private] => Array
        (
            [0] => for
            [1] => GeeksforGeeks
            [2] => Science
            [3] => Geeks
            [4] => Portal
            [5] => Computer
        )

)
Reference: https://www.php.net/manual/en/arrayiterator.offsetset.php

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