PHP | ArrayIterator offsetSet() Function

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

Output:

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

)

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